ui/accessibility/accessibility_features.h - chromium/src - Git at Google

 // Copyright 2019 The Chromium Authors
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.

 // Define all the base::Features used by ui/accessibility.
 #ifndef UI_ACCESSIBILITY_ACCESSIBILITY_FEATURES_H_
 #define UI_ACCESSIBILITY_ACCESSIBILITY_FEATURES_H_

 #include "base/feature_list.h"
 #include "build/build_config.h"
 #include "build/chromeos_buildflags.h"
 #include "ui/accessibility/ax_base_export.h"

 // This file declares base::Features related to the ui/accessibility code.
 //
 // If your flag is for all platforms, include it in the first section. If
 // the flag is build-specific, include it in the appropriate section or
 // add a new section if needed.
 //
 // Keep all sections ordered alphabetically.
 //
 // Include the base declaration, and a bool "is...Enabled()" getter for
 // convenience and consistency. The bool method does not need a comment. Place a
 // comment above the feature flag describing what the flag does when enabled.
 // For example, a new entry should look like:
 //
 //    // <<effect of the experiment>>
 //    AX_BASE_EXPORT BASE_DECLARE_FEATURE(kNewFeature);
 //    AX_BASE_EXPORT bool IsNewFeatureEnabled();
 //
 // In the .cc file, a corresponding new entry should look like:
 //
 //    BASE_FEATURE(kNewFeature, "NewFeature",
 //    base::FEATURE_DISABLED_BY_DEFAULT); bool IsNewFeatureEnabled() {
 //      return base::FeatureList::IsEnabled(::features::kNewFeature);
 //    }
 //
 // Your feature name should start with "kAccessibility". There is no need to
 // include the words "enabled" or "experimental", as these are implied. We
 // include accessibility to differentiate these features from others in
 // Chromium.

 namespace features {

 // Increase the cost of SendPendingAccessibilityEvents.
 AX_BASE_EXPORT BASE_DECLARE_FEATURE(kAblateSendPendingAccessibilityEvents);
 AX_BASE_EXPORT bool IsAblateSendPendingAccessibilityEventsEnabled();

 // Draw a visual highlight around the focused element on the page
 // briefly whenever focus changes.
 AX_BASE_EXPORT BASE_DECLARE_FEATURE(kAccessibilityFocusHighlight);
 AX_BASE_EXPORT bool IsAccessibilityFocusHighlightEnabled();

 // Enable PDF OCR for Select-to-Speak. It will be disabled by default on
 // platforms other than ChromeOS as STS is available only on ChromeOS.
 AX_BASE_EXPORT BASE_DECLARE_FEATURE(kAccessibilityPdfOcrForSelectToSpeak);
 AX_BASE_EXPORT bool IsAccessibilityPdfOcrForSelectToSpeakEnabled();

 // Augment existing images labels in addition to unlabeled images.
 AX_BASE_EXPORT BASE_DECLARE_FEATURE(kAugmentExistingImageLabels);
 AX_BASE_EXPORT bool IsAugmentExistingImageLabelsEnabled();

 // Disable the accessibility engine after a certain
 // number of user input events spanning a minimum amount of time with no
 // accessibility API usage in that time.
 AX_BASE_EXPORT BASE_DECLARE_FEATURE(kAutoDisableAccessibility);
 AX_BASE_EXPORT bool IsAutoDisableAccessibilityEnabled();

 // Make PDFs displayed in the ChromeOS Media App (AKA Backlight)
 // accessible by performing OCR on the images for each page.
 // TODO(nektar): Should this be moved to ChromeOS section?
 AX_BASE_EXPORT BASE_DECLARE_FEATURE(kBacklightOcr);
 AX_BASE_EXPORT bool IsBacklightOcrEnabled();

 // Recognize "aria-virtualcontent" as a valid aria property.
 AX_BASE_EXPORT BASE_DECLARE_FEATURE(kEnableAccessibilityAriaVirtualContent);
 AX_BASE_EXPORT bool IsAccessibilityAriaVirtualContentEnabled();

 // Expose the <html> element to the browser process AXTree (as an
 // ignored node).
 AX_BASE_EXPORT BASE_DECLARE_FEATURE(kEnableAccessibilityExposeHTMLElement);
 AX_BASE_EXPORT bool IsAccessibilityExposeHTMLElementEnabled();

 // Expose all ignored nodes by Blink in the accessibility tree.
 AX_BASE_EXPORT BASE_DECLARE_FEATURE(kEnableAccessibilityExposeIgnoredNodes);
 AX_BASE_EXPORT bool IsAccessibilityExposeIgnoredNodesEnabled();

 // Use language detection to determine the language
 // of text content in page and exposed to the browser process AXTree.
 AX_BASE_EXPORT BASE_DECLARE_FEATURE(kEnableAccessibilityLanguageDetection);
 AX_BASE_EXPORT bool IsAccessibilityLanguageDetectionEnabled();

 // Restrict AXModes to web content related modes only when an IA2
 // query is performed on a web content node.
 // TODO(1441211): Remove flag once the change has been confirmed safe.
 AX_BASE_EXPORT BASE_DECLARE_FEATURE(kEnableAccessibilityRestrictiveIA2AXModes);
 AX_BASE_EXPORT bool IsAccessibilityRestrictiveIA2AXModesEnabled();

 // Serialize accessibility information from the Views tree and
 // deserialize it into an AXTree in the browser process.
 AX_BASE_EXPORT BASE_DECLARE_FEATURE(kEnableAccessibilityTreeForViews);
 AX_BASE_EXPORT bool IsAccessibilityTreeForViewsEnabled();

 // Support aria element reflection. For example:
 //     element.ariaActiveDescendantElement = child;
 AX_BASE_EXPORT BASE_DECLARE_FEATURE(kEnableAriaElementReflection);
 AX_BASE_EXPORT bool IsAriaElementReflectionEnabled();

 // Turn on browser vocalization of 'descriptions' tracks.
 AX_BASE_EXPORT BASE_DECLARE_FEATURE(kTextBasedAudioDescription);
 AX_BASE_EXPORT bool IsTextBasedAudioDescriptionEnabled();

 // Expose document markers on inline text boxes in addition to
 // static nodes. (Note: This will make it possible for AXPosition in the browser
 // process to handle document markers, which will be platform agnositc)
 AX_BASE_EXPORT BASE_DECLARE_FEATURE(kUseAXPositionForDocumentMarkers);
 AX_BASE_EXPORT bool IsUseAXPositionForDocumentMarkersEnabled();

 #if BUILDFLAG(IS_WIN)
 // Use Chrome-specific accessibility COM API.
 AX_BASE_EXPORT BASE_DECLARE_FEATURE(kIChromeAccessible);
 AX_BASE_EXPORT bool IsIChromeAccessibleEnabled();

 // Selectively enable accessibility depending on the
 // UIA APIs that are called. (Note: This will make it possible for
 // non-screenreader services to enable less of the accessibility system)
 AX_BASE_EXPORT BASE_DECLARE_FEATURE(kSelectiveUIAEnablement);
 AX_BASE_EXPORT bool IsSelectiveUIAEnablementEnabled();

 // Use the browser's UIA provider when requested by
 // an accessibility client.
 AX_BASE_EXPORT BASE_DECLARE_FEATURE(kUiaProvider);
 AX_BASE_EXPORT bool IsUiaProviderEnabled();
 #endif  // BUILDFLAG(IS_WIN)

 #if BUILDFLAG(IS_CHROMEOS_ASH)
 // TODO(accessibility): Should this be moved to ash_features.cc?
 AX_BASE_EXPORT bool IsDictationOfflineAvailable();

 // Allow accessibility accelerator notifications to timeout.
 AX_BASE_EXPORT BASE_DECLARE_FEATURE(
     kAccessibilityAcceleratorNotificationsTimeout);
 AX_BASE_EXPORT bool IsAccessibilityAcceleratorNotificationsTimeoutEnabled();

 // Use Dictation keyboard improvements.
 AX_BASE_EXPORT BASE_DECLARE_FEATURE(
     kAccessibilityDictationKeyboardImprovements);
 AX_BASE_EXPORT bool IsAccessibilityDictationKeyboardImprovementsEnabled();

 // Integrate with FaceGaze.
 AX_BASE_EXPORT BASE_DECLARE_FEATURE(kAccessibilityFaceGaze);
 AX_BASE_EXPORT bool IsAccessibilityFaceGazeEnabled();

 // Use Select-to-Speak hover text improvements.
 AX_BASE_EXPORT BASE_DECLARE_FEATURE(
     kAccessibilitySelectToSpeakHoverTextImprovements);
 AX_BASE_EXPORT bool IsAccessibilitySelectToSpeakHoverTextImprovementsEnabled();

 // Allow context checking with the accessibility Dictation
 // feature.
 AX_BASE_EXPORT BASE_DECLARE_FEATURE(
     kExperimentalAccessibilityDictationContextChecking);
 AX_BASE_EXPORT bool
 IsExperimentalAccessibilityDictationContextCheckingEnabled();

 // Download Google TTS High Quality voices.
 AX_BASE_EXPORT BASE_DECLARE_FEATURE(
     kExperimentalAccessibilityGoogleTtsHighQualityVoices);
 AX_BASE_EXPORT bool
 IsExperimentalAccessibilityGoogleTtsHighQualityVoicesEnabled();

 // Use Language Packs to download Google TTS voices.
 AX_BASE_EXPORT BASE_DECLARE_FEATURE(
     kExperimentalAccessibilityGoogleTtsLanguagePacks);
 AX_BASE_EXPORT bool IsExperimentalAccessibilityGoogleTtsLanguagePacksEnabled();

 // Whether the extra-large cursor size feature is enabled.
 AX_BASE_EXPORT BASE_DECLARE_FEATURE(kAccessibilityExtraLargeCursor);
 AX_BASE_EXPORT bool IsAccessibilityExtraLargeCursorEnabled();

 #endif  // BUILDFLAG(IS_CHROMEOS_ASH)

 #if BUILDFLAG(IS_ANDROID)
 // Filter AXModes based on running accessibility services.
 AX_BASE_EXPORT BASE_DECLARE_FEATURE(kAccessibilityPerformanceFiltering);
 AX_BASE_EXPORT bool IsAccessibilityPerformanceFilteringEnabled();

 // Disable max node and timeout limits on the
 // AXTreeSnapshotter's Snapshot method, and track related histograms.
 AX_BASE_EXPORT BASE_DECLARE_FEATURE(kAccessibilitySnapshotStressTests);
 AX_BASE_EXPORT bool IsAccessibilitySnapshotStressTestsEnabled();
 #endif  // BUILDFLAG(IS_ANDROID)

 #if !BUILDFLAG(IS_ANDROID)
 // Use the experimental Accessibility Service.
 // TODO(katydek): Provide a more descriptive name here.
 AX_BASE_EXPORT BASE_DECLARE_FEATURE(kAccessibilityService);
 AX_BASE_EXPORT bool IsAccessibilityServiceEnabled();

 // Open Read Anything side panel when the browser is opened, and
 // call distill after the navigation's load-complete event. (Note: The browser
 // is only being opened to render one webpage, for the sake of generating
 // training data for Screen2x data collection. The browser is intended to be
 // closed by the user who launches Chrome once the first distill call finishes
 // executing.)
 //
 // Note: This feature should be used along with 'ScreenAIDebugModeEnabled=true'
 // and --no-sandbox.
 AX_BASE_EXPORT BASE_DECLARE_FEATURE(kDataCollectionModeForScreen2x);
 AX_BASE_EXPORT bool IsDataCollectionModeForScreen2xEnabled();

 // Use local MI service to make inaccessibile surfaces (e.g.
 // canvases) accessible.
 AX_BASE_EXPORT BASE_DECLARE_FEATURE(kLayoutExtraction);
 AX_BASE_EXPORT bool IsLayoutExtractionEnabled();

 // Use OCR to make inaccessible (i.e. untagged) PDFs
 // accessibility. (Note: Due to the size of the OCR component, this feature
 // targets only desktop versions of Chrome for now.)
 AX_BASE_EXPORT BASE_DECLARE_FEATURE(kPdfOcr);
 AX_BASE_EXPORT bool IsPdfOcrEnabled();

 // Include the Read Anything feature. (Note: This feature shows
 // users websites, such as articles, in a comfortable reading experience in a
 // side panel)
 AX_BASE_EXPORT BASE_DECLARE_FEATURE(kReadAnything);
 AX_BASE_EXPORT bool IsReadAnythingEnabled();

 // Make the Read Anything Side Panel local (don't persist when opening a new
 // tab)
 AX_BASE_EXPORT BASE_DECLARE_FEATURE(kReadAnythingLocalSidePanel);
 AX_BASE_EXPORT bool IsReadAnythingLocalSidePanelEnabled();

 // Show a reading mode icon in the omnibox.
 AX_BASE_EXPORT BASE_DECLARE_FEATURE(kReadAnythingOmniboxIcon);
 AX_BASE_EXPORT bool IsReadAnythingOmniboxIconEnabled();

 // Show the Read Aloud feature in Read Anything.
 AX_BASE_EXPORT BASE_DECLARE_FEATURE(kReadAnythingReadAloud);
 AX_BASE_EXPORT bool IsReadAnythingReadAloudEnabled();

 // Use the WebUI toolbar in Read Anything.
 AX_BASE_EXPORT BASE_DECLARE_FEATURE(kReadAnythingWebUIToolbar);
 AX_BASE_EXPORT bool IsReadAnythingWebUIToolbarEnabled();

 // Use screen2x integration for Read Anything to distill web pages
 // using an ML model.
 AX_BASE_EXPORT BASE_DECLARE_FEATURE(kReadAnythingWithScreen2x);
 AX_BASE_EXPORT bool IsReadAnythingWithScreen2xEnabled();

 // Enable rules based algorithm for distilling content. Should be enabled by
 // default.
 AX_BASE_EXPORT BASE_DECLARE_FEATURE(kReadAnythingWithAlgorithm);
 AX_BASE_EXPORT bool IsReadAnythingWithAlgorithmEnabled();

 // Write some ScreenAI library debug data in /tmp.
 AX_BASE_EXPORT BASE_DECLARE_FEATURE(kScreenAIDebugMode);
 AX_BASE_EXPORT bool IsScreenAIDebugModeEnabled();
 #endif  // !BUILDFLAG(IS_ANDROID)

 #if BUILDFLAG(IS_MAC)
 // Set NSAccessibilityRemoteUIElement's RemoteUIApp to YES to fix
 // some accessibility bugs in PWA Mac. (Note: When enabling
 // NSAccessibilityRemoteUIElement's RemoteUIApp previously, chromium would hang.
 // See: https://crbug.com/1491329).
 AX_BASE_EXPORT BASE_DECLARE_FEATURE(kAccessibilityRemoteUIApp);
 AX_BASE_EXPORT bool IsAccessibilityRemoteUIAppEnabled();
 #endif  // BUILDFLAG(IS_MAC)

 }  // namespace features

 #endif  // UI_ACCESSIBILITY_ACCESSIBILITY_FEATURES_H_
	// Copyright 2019 The Chromium Authors
	// Use of this source code is governed by a BSD-style license that can be
	// found in the LICENSE file.

	// Define all the base::Features used by ui/accessibility.
	#ifndef UI_ACCESSIBILITY_ACCESSIBILITY_FEATURES_H_
	#define UI_ACCESSIBILITY_ACCESSIBILITY_FEATURES_H_

	#include "base/feature_list.h"
	#include "build/build_config.h"
	#include "build/chromeos_buildflags.h"
	#include "ui/accessibility/ax_base_export.h"

	// This file declares base::Features related to the ui/accessibility code.
	//
	// If your flag is for all platforms, include it in the first section. If
	// the flag is build-specific, include it in the appropriate section or
	// add a new section if needed.
	//
	// Keep all sections ordered alphabetically.
	//
	// Include the base declaration, and a bool "is...Enabled()" getter for
	// convenience and consistency. The bool method does not need a comment. Place a
	// comment above the feature flag describing what the flag does when enabled.
	// For example, a new entry should look like:
	//
	// // <<effect of the experiment>>
	// AX_BASE_EXPORT BASE_DECLARE_FEATURE(kNewFeature);
	// AX_BASE_EXPORT bool IsNewFeatureEnabled();
	//
	// In the .cc file, a corresponding new entry should look like:
	//
	// BASE_FEATURE(kNewFeature, "NewFeature",
	// base::FEATURE_DISABLED_BY_DEFAULT); bool IsNewFeatureEnabled() {
	// return base::FeatureList::IsEnabled(::features::kNewFeature);
	// }
	//
	// Your feature name should start with "kAccessibility". There is no need to
	// include the words "enabled" or "experimental", as these are implied. We
	// include accessibility to differentiate these features from others in
	// Chromium.

	namespace features {

	// Increase the cost of SendPendingAccessibilityEvents.
	AX_BASE_EXPORT BASE_DECLARE_FEATURE(kAblateSendPendingAccessibilityEvents);
	AX_BASE_EXPORT bool IsAblateSendPendingAccessibilityEventsEnabled();

	// Draw a visual highlight around the focused element on the page
	// briefly whenever focus changes.
	AX_BASE_EXPORT BASE_DECLARE_FEATURE(kAccessibilityFocusHighlight);
	AX_BASE_EXPORT bool IsAccessibilityFocusHighlightEnabled();

	// Enable PDF OCR for Select-to-Speak. It will be disabled by default on
	// platforms other than ChromeOS as STS is available only on ChromeOS.
	AX_BASE_EXPORT BASE_DECLARE_FEATURE(kAccessibilityPdfOcrForSelectToSpeak);
	AX_BASE_EXPORT bool IsAccessibilityPdfOcrForSelectToSpeakEnabled();

	// Augment existing images labels in addition to unlabeled images.
	AX_BASE_EXPORT BASE_DECLARE_FEATURE(kAugmentExistingImageLabels);
	AX_BASE_EXPORT bool IsAugmentExistingImageLabelsEnabled();

	// Disable the accessibility engine after a certain
	// number of user input events spanning a minimum amount of time with no
	// accessibility API usage in that time.
	AX_BASE_EXPORT BASE_DECLARE_FEATURE(kAutoDisableAccessibility);
	AX_BASE_EXPORT bool IsAutoDisableAccessibilityEnabled();

	// Make PDFs displayed in the ChromeOS Media App (AKA Backlight)
	// accessible by performing OCR on the images for each page.
	// TODO(nektar): Should this be moved to ChromeOS section?
	AX_BASE_EXPORT BASE_DECLARE_FEATURE(kBacklightOcr);
	AX_BASE_EXPORT bool IsBacklightOcrEnabled();

	// Recognize "aria-virtualcontent" as a valid aria property.
	AX_BASE_EXPORT BASE_DECLARE_FEATURE(kEnableAccessibilityAriaVirtualContent);
	AX_BASE_EXPORT bool IsAccessibilityAriaVirtualContentEnabled();

	// Expose the <html> element to the browser process AXTree (as an
	// ignored node).
	AX_BASE_EXPORT BASE_DECLARE_FEATURE(kEnableAccessibilityExposeHTMLElement);
	AX_BASE_EXPORT bool IsAccessibilityExposeHTMLElementEnabled();

	// Expose all ignored nodes by Blink in the accessibility tree.
	AX_BASE_EXPORT BASE_DECLARE_FEATURE(kEnableAccessibilityExposeIgnoredNodes);
	AX_BASE_EXPORT bool IsAccessibilityExposeIgnoredNodesEnabled();

	// Use language detection to determine the language
	// of text content in page and exposed to the browser process AXTree.
	AX_BASE_EXPORT BASE_DECLARE_FEATURE(kEnableAccessibilityLanguageDetection);
	AX_BASE_EXPORT bool IsAccessibilityLanguageDetectionEnabled();

	// Restrict AXModes to web content related modes only when an IA2
	// query is performed on a web content node.
	// TODO(1441211): Remove flag once the change has been confirmed safe.
	AX_BASE_EXPORT BASE_DECLARE_FEATURE(kEnableAccessibilityRestrictiveIA2AXModes);
	AX_BASE_EXPORT bool IsAccessibilityRestrictiveIA2AXModesEnabled();

	// Serialize accessibility information from the Views tree and
	// deserialize it into an AXTree in the browser process.
	AX_BASE_EXPORT BASE_DECLARE_FEATURE(kEnableAccessibilityTreeForViews);
	AX_BASE_EXPORT bool IsAccessibilityTreeForViewsEnabled();

	// Support aria element reflection. For example:
	// element.ariaActiveDescendantElement = child;
	AX_BASE_EXPORT BASE_DECLARE_FEATURE(kEnableAriaElementReflection);
	AX_BASE_EXPORT bool IsAriaElementReflectionEnabled();

	// Turn on browser vocalization of 'descriptions' tracks.
	AX_BASE_EXPORT BASE_DECLARE_FEATURE(kTextBasedAudioDescription);
	AX_BASE_EXPORT bool IsTextBasedAudioDescriptionEnabled();

	// Expose document markers on inline text boxes in addition to
	// static nodes. (Note: This will make it possible for AXPosition in the browser
	// process to handle document markers, which will be platform agnositc)
	AX_BASE_EXPORT BASE_DECLARE_FEATURE(kUseAXPositionForDocumentMarkers);
	AX_BASE_EXPORT bool IsUseAXPositionForDocumentMarkersEnabled();

	#if BUILDFLAG(IS_WIN)
	// Use Chrome-specific accessibility COM API.
	AX_BASE_EXPORT BASE_DECLARE_FEATURE(kIChromeAccessible);
	AX_BASE_EXPORT bool IsIChromeAccessibleEnabled();

	// Selectively enable accessibility depending on the
	// UIA APIs that are called. (Note: This will make it possible for
	// non-screenreader services to enable less of the accessibility system)
	AX_BASE_EXPORT BASE_DECLARE_FEATURE(kSelectiveUIAEnablement);
	AX_BASE_EXPORT bool IsSelectiveUIAEnablementEnabled();

	// Use the browser's UIA provider when requested by
	// an accessibility client.
	AX_BASE_EXPORT BASE_DECLARE_FEATURE(kUiaProvider);
	AX_BASE_EXPORT bool IsUiaProviderEnabled();
	#endif // BUILDFLAG(IS_WIN)

	#if BUILDFLAG(IS_CHROMEOS_ASH)
	// TODO(accessibility): Should this be moved to ash_features.cc?
	AX_BASE_EXPORT bool IsDictationOfflineAvailable();

	// Allow accessibility accelerator notifications to timeout.
	AX_BASE_EXPORT BASE_DECLARE_FEATURE(
	kAccessibilityAcceleratorNotificationsTimeout);
	AX_BASE_EXPORT bool IsAccessibilityAcceleratorNotificationsTimeoutEnabled();

	// Use Dictation keyboard improvements.
	AX_BASE_EXPORT BASE_DECLARE_FEATURE(
	kAccessibilityDictationKeyboardImprovements);
	AX_BASE_EXPORT bool IsAccessibilityDictationKeyboardImprovementsEnabled();

	// Integrate with FaceGaze.
	AX_BASE_EXPORT BASE_DECLARE_FEATURE(kAccessibilityFaceGaze);
	AX_BASE_EXPORT bool IsAccessibilityFaceGazeEnabled();

	// Use Select-to-Speak hover text improvements.
	AX_BASE_EXPORT BASE_DECLARE_FEATURE(
	kAccessibilitySelectToSpeakHoverTextImprovements);
	AX_BASE_EXPORT bool IsAccessibilitySelectToSpeakHoverTextImprovementsEnabled();

	// Allow context checking with the accessibility Dictation
	// feature.
	AX_BASE_EXPORT BASE_DECLARE_FEATURE(
	kExperimentalAccessibilityDictationContextChecking);
	AX_BASE_EXPORT bool
	IsExperimentalAccessibilityDictationContextCheckingEnabled();

	// Download Google TTS High Quality voices.
	AX_BASE_EXPORT BASE_DECLARE_FEATURE(
	kExperimentalAccessibilityGoogleTtsHighQualityVoices);
	AX_BASE_EXPORT bool
	IsExperimentalAccessibilityGoogleTtsHighQualityVoicesEnabled();

	// Use Language Packs to download Google TTS voices.
	AX_BASE_EXPORT BASE_DECLARE_FEATURE(
	kExperimentalAccessibilityGoogleTtsLanguagePacks);
	AX_BASE_EXPORT bool IsExperimentalAccessibilityGoogleTtsLanguagePacksEnabled();

	// Whether the extra-large cursor size feature is enabled.
	AX_BASE_EXPORT BASE_DECLARE_FEATURE(kAccessibilityExtraLargeCursor);
	AX_BASE_EXPORT bool IsAccessibilityExtraLargeCursorEnabled();

	#endif // BUILDFLAG(IS_CHROMEOS_ASH)

	#if BUILDFLAG(IS_ANDROID)
	// Filter AXModes based on running accessibility services.
	AX_BASE_EXPORT BASE_DECLARE_FEATURE(kAccessibilityPerformanceFiltering);
	AX_BASE_EXPORT bool IsAccessibilityPerformanceFilteringEnabled();

	// Disable max node and timeout limits on the
	// AXTreeSnapshotter's Snapshot method, and track related histograms.
	AX_BASE_EXPORT BASE_DECLARE_FEATURE(kAccessibilitySnapshotStressTests);
	AX_BASE_EXPORT bool IsAccessibilitySnapshotStressTestsEnabled();
	#endif // BUILDFLAG(IS_ANDROID)

	#if !BUILDFLAG(IS_ANDROID)
	// Use the experimental Accessibility Service.
	// TODO(katydek): Provide a more descriptive name here.
	AX_BASE_EXPORT BASE_DECLARE_FEATURE(kAccessibilityService);
	AX_BASE_EXPORT bool IsAccessibilityServiceEnabled();

	// Open Read Anything side panel when the browser is opened, and
	// call distill after the navigation's load-complete event. (Note: The browser
	// is only being opened to render one webpage, for the sake of generating
	// training data for Screen2x data collection. The browser is intended to be
	// closed by the user who launches Chrome once the first distill call finishes
	// executing.)
	//
	// Note: This feature should be used along with 'ScreenAIDebugModeEnabled=true'
	// and --no-sandbox.
	AX_BASE_EXPORT BASE_DECLARE_FEATURE(kDataCollectionModeForScreen2x);
	AX_BASE_EXPORT bool IsDataCollectionModeForScreen2xEnabled();

	// Use local MI service to make inaccessibile surfaces (e.g.
	// canvases) accessible.
	AX_BASE_EXPORT BASE_DECLARE_FEATURE(kLayoutExtraction);
	AX_BASE_EXPORT bool IsLayoutExtractionEnabled();

	// Use OCR to make inaccessible (i.e. untagged) PDFs
	// accessibility. (Note: Due to the size of the OCR component, this feature
	// targets only desktop versions of Chrome for now.)
	AX_BASE_EXPORT BASE_DECLARE_FEATURE(kPdfOcr);
	AX_BASE_EXPORT bool IsPdfOcrEnabled();

	// Include the Read Anything feature. (Note: This feature shows
	// users websites, such as articles, in a comfortable reading experience in a
	// side panel)
	AX_BASE_EXPORT BASE_DECLARE_FEATURE(kReadAnything);
	AX_BASE_EXPORT bool IsReadAnythingEnabled();

	// Make the Read Anything Side Panel local (don't persist when opening a new
	// tab)
	AX_BASE_EXPORT BASE_DECLARE_FEATURE(kReadAnythingLocalSidePanel);
	AX_BASE_EXPORT bool IsReadAnythingLocalSidePanelEnabled();

	// Show a reading mode icon in the omnibox.
	AX_BASE_EXPORT BASE_DECLARE_FEATURE(kReadAnythingOmniboxIcon);
	AX_BASE_EXPORT bool IsReadAnythingOmniboxIconEnabled();

	// Show the Read Aloud feature in Read Anything.
	AX_BASE_EXPORT BASE_DECLARE_FEATURE(kReadAnythingReadAloud);
	AX_BASE_EXPORT bool IsReadAnythingReadAloudEnabled();

	// Use the WebUI toolbar in Read Anything.
	AX_BASE_EXPORT BASE_DECLARE_FEATURE(kReadAnythingWebUIToolbar);
	AX_BASE_EXPORT bool IsReadAnythingWebUIToolbarEnabled();

	// Use screen2x integration for Read Anything to distill web pages
	// using an ML model.
	AX_BASE_EXPORT BASE_DECLARE_FEATURE(kReadAnythingWithScreen2x);
	AX_BASE_EXPORT bool IsReadAnythingWithScreen2xEnabled();

	// Enable rules based algorithm for distilling content. Should be enabled by
	// default.
	AX_BASE_EXPORT BASE_DECLARE_FEATURE(kReadAnythingWithAlgorithm);
	AX_BASE_EXPORT bool IsReadAnythingWithAlgorithmEnabled();

	// Write some ScreenAI library debug data in /tmp.
	AX_BASE_EXPORT BASE_DECLARE_FEATURE(kScreenAIDebugMode);
	AX_BASE_EXPORT bool IsScreenAIDebugModeEnabled();
	#endif // !BUILDFLAG(IS_ANDROID)

	#if BUILDFLAG(IS_MAC)
	// Set NSAccessibilityRemoteUIElement's RemoteUIApp to YES to fix
	// some accessibility bugs in PWA Mac. (Note: When enabling
	// NSAccessibilityRemoteUIElement's RemoteUIApp previously, chromium would hang.
	// See: https://crbug.com/1491329).
	AX_BASE_EXPORT BASE_DECLARE_FEATURE(kAccessibilityRemoteUIApp);
	AX_BASE_EXPORT bool IsAccessibilityRemoteUIAppEnabled();
	#endif // BUILDFLAG(IS_MAC)

	} // namespace features

	#endif // UI_ACCESSIBILITY_ACCESSIBILITY_FEATURES_H_