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"

 namespace features {

 AX_BASE_EXPORT BASE_DECLARE_FEATURE(kEnableAccessibilityAriaVirtualContent);

 // Returns true if "aria-virtualcontent" should be recognized as a valid aria
 // property.
 AX_BASE_EXPORT bool IsAccessibilityAriaVirtualContentEnabled();

 AX_BASE_EXPORT BASE_DECLARE_FEATURE(kEnableAccessibilityExposeHTMLElement);

 // Returns true if the <html> element should be exposed to the
 // browser process AXTree (as an ignored node).
 AX_BASE_EXPORT bool IsAccessibilityExposeHTMLElementEnabled();

 AX_BASE_EXPORT BASE_DECLARE_FEATURE(kEnableAccessibilityExposeIgnoredNodes);

 // Returns true if all ignored nodes are exposed by Blink in the
 // accessibility tree.
 AX_BASE_EXPORT bool IsAccessibilityExposeIgnoredNodesEnabled();

 AX_BASE_EXPORT BASE_DECLARE_FEATURE(kEnableAccessibilityLanguageDetection);

 // Return true if language detection should be used to determine the language
 // of text content in page and exposed to the browser process AXTree.
 AX_BASE_EXPORT bool IsAccessibilityLanguageDetectionEnabled();

 // Serializes accessibility information from the Views tree and deserializes it
 // into an AXTree in the browser process.
 AX_BASE_EXPORT BASE_DECLARE_FEATURE(kEnableAccessibilityTreeForViews);

 // Returns true if the Views tree is exposed using an AXTree in the browser
 // process. Returns false if the Views tree is exposed to accessibility
 // directly.
 AX_BASE_EXPORT bool IsAccessibilityTreeForViewsEnabled();

 AX_BASE_EXPORT BASE_DECLARE_FEATURE(kEnableAccessibilityRestrictiveIA2AXModes);

 // Returns true if the more restrictive approach that only enables the web
 // content related AXModes on an IA2 query when the data is being queried on an
 // web content node.
 //
 // TODO(1441211): Remove flag once the change has been confirmed safe.
 AX_BASE_EXPORT bool IsAccessibilityRestrictiveIA2AXModesEnabled();

 AX_BASE_EXPORT BASE_DECLARE_FEATURE(kAccessibilityFocusHighlight);

 // Returns true if the accessibility focus highlight feature is enabled,
 // which draws a visual highlight around the focused element on the page
 // briefly whenever focus changes.
 AX_BASE_EXPORT bool IsAccessibilityFocusHighlightEnabled();

 AX_BASE_EXPORT BASE_DECLARE_FEATURE(kAutoDisableAccessibility);

 // Returns true if accessibility will be auto-disabled 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 bool IsAutoDisableAccessibilityEnabled();

 // Enables a setting that can turn on/off browser vocalization of 'descriptions'
 // tracks.
 AX_BASE_EXPORT BASE_DECLARE_FEATURE(kTextBasedAudioDescription);

 // Returns true if the setting to turn on text based audio descriptions is
 // enabled.
 AX_BASE_EXPORT bool IsTextBasedAudioDescriptionEnabled();

 // Returns true if the accessibility code should use experimental optimization
 // techniques in the AXTree::Unserialize method.
 AX_BASE_EXPORT bool IsUnserializeOptimizationsEnabled();

 // Enables an experimental implementation in AXTree for performance tests.
 AX_BASE_EXPORT BASE_DECLARE_FEATURE(kAccessibilityUnserializeOptimizations);

 #if BUILDFLAG(IS_WIN)
 // Enables an experimental Chrome-specific accessibility COM API
 AX_BASE_EXPORT BASE_DECLARE_FEATURE(kIChromeAccessible);

 // Returns true if the IChromeAccessible COM API is enabled.
 AX_BASE_EXPORT bool IsIChromeAccessibleEnabled();

 AX_BASE_EXPORT BASE_DECLARE_FEATURE(kSelectiveUIAEnablement);

 // Returns true if accessibility will be selectively enabled depending on the
 // UIA APIs that are called, allowing non-screenreader usage to enable less of
 // the accessibility system.
 AX_BASE_EXPORT bool IsSelectiveUIAEnablementEnabled();

 #endif  // BUILDFLAG(IS_WIN)

 #if BUILDFLAG(IS_CHROMEOS_ASH)
 AX_BASE_EXPORT bool IsDictationOfflineAvailable();

 // Enables Context Checking with the accessibility Dictation feature.
 AX_BASE_EXPORT BASE_DECLARE_FEATURE(
     kExperimentalAccessibilityDictationContextChecking);

 // Returns true if Dictation with context checking is enabled.
 AX_BASE_EXPORT bool
 IsExperimentalAccessibilityDictationContextCheckingEnabled();

 // Enables downloading Google TTS voices using Language Packs.
 AX_BASE_EXPORT BASE_DECLARE_FEATURE(
     kExperimentalAccessibilityGoogleTtsLanguagePacks);

 // Returns true if using Language Packs to download Google TTS voices is
 // enabled.
 AX_BASE_EXPORT bool IsExperimentalAccessibilityGoogleTtsLanguagePacksEnabled();

 // Enables the experimental color enhancements settings.
 AX_BASE_EXPORT BASE_DECLARE_FEATURE(
     kExperimentalAccessibilityColorEnhancementSettings);

 // Returns true if the experimental color enhancements settings are enabled.
 AX_BASE_EXPORT bool
 AreExperimentalAccessibilityColorEnhancementSettingsEnabled();

 // Enables Select-to-Speak settings page migration from extension options page
 // to Chrome OS settings page.
 AX_BASE_EXPORT BASE_DECLARE_FEATURE(kAccessibilitySelectToSpeakPageMigration);

 // Returns true if Select-to-Speak settings page migration enabled.
 AX_BASE_EXPORT bool IsAccessibilitySelectToSpeakPageMigrationEnabled();

 // Enables ChromeVox settings page migration from extension options page to
 // Chrome OS settings page.
 AX_BASE_EXPORT BASE_DECLARE_FEATURE(kAccessibilityChromeVoxPageMigration);

 // Returns true if ChromeVox settings page migration is enabled.
 AX_BASE_EXPORT bool IsAccessibilityChromeVoxPageMigrationEnabled();

 // Enables AccessibilitySelectToSpeakPrefsMigration.
 AX_BASE_EXPORT BASE_DECLARE_FEATURE(kAccessibilitySelectToSpeakPrefsMigration);

 // Returns true if AccessibilitySelectToSpeakPrefsMigration enabled.
 AX_BASE_EXPORT bool IsAccessibilitySelectToSpeakPrefsMigrationEnabled();

 // Enables AccessibilitySelectToSpeakHoverTextImprovements.
 AX_BASE_EXPORT BASE_DECLARE_FEATURE(
     kAccessibilitySelectToSpeakHoverTextImprovements);

 // Returns true if AccessibilitySelectToSpeakHoverTextImprovements is enabled.
 AX_BASE_EXPORT bool IsAccessibilitySelectToSpeakHoverTextImprovementsEnabled();

 // Enables accessibility accelerator notifications to timeout.
 AX_BASE_EXPORT BASE_DECLARE_FEATURE(
     kAccessibilityAcceleratorNotificationsTimeout);

 // Returns true if kAccessibilityAcceleratorNotificationsTimeout is enabled.
 AX_BASE_EXPORT bool IsAccessibilityAcceleratorNotificationsTimeoutEnabled();

 // Enables the deprecation of ChromeVox tabs menu.
 AX_BASE_EXPORT BASE_DECLARE_FEATURE(kAccessibilityDeprecateChromeVoxTabs);

 // Returns true if kAccessibilityDeprecateChromeVoxTabs is enabled.
 AX_BASE_EXPORT bool IsAccessibilityDeprecateChromeVoxTabsEnabled();

 #endif  // BUILDFLAG(IS_CHROMEOS_ASH)

 // Enables Get Image Descriptions to augment existing images labels,
 // rather than only provide descriptions for completely unlabeled images.
 AX_BASE_EXPORT BASE_DECLARE_FEATURE(kAugmentExistingImageLabels);

 // Returns true if augmenting existing image labels is enabled.
 AX_BASE_EXPORT bool IsAugmentExistingImageLabelsEnabled();

 // Once this flag is enabled, a single codebase in AXPosition will be used for
 // handling document markers on all platforms, including the announcement of
 // spelling mistakes.
 AX_BASE_EXPORT BASE_DECLARE_FEATURE(kUseAXPositionForDocumentMarkers);

 // Returns true if document markers are exposed on inline text boxes in the
 // accessibility tree in addition to on static text nodes. This in turn enables
 // AXPosition on the browser to discover and work with document markers, instead
 // of the legacy code that collects document markers manually from static text
 // nodes and which is different for each platform.
 AX_BASE_EXPORT bool IsUseAXPositionForDocumentMarkersEnabled();

 // Enable support for ARIA element reflection, for example
 // element.ariaActiveDescendantElement = child;
 AX_BASE_EXPORT BASE_DECLARE_FEATURE(kEnableAriaElementReflection);

 // Returns true if ARIA element reflection is enabled.
 AX_BASE_EXPORT bool IsAriaElementReflectionEnabled();

 // Experiment to increase the cost of SendPendingAccessibilityEvents.
 AX_BASE_EXPORT BASE_DECLARE_FEATURE(kAblateSendPendingAccessibilityEvents);

 // Returns true if |kAblateSendPendingAccessibilityEvents| is enabled.
 AX_BASE_EXPORT bool IsAblateSendPendingAccessibilityEventsEnabled();

 #if BUILDFLAG(IS_ANDROID)
 // Enable AXModes based on running services. If disabled, then AXModes
 // will not be available to be set.
 AX_BASE_EXPORT BASE_DECLARE_FEATURE(kAccessibilityAXModes);

 // Returns true if AXMode is enabled.
 AX_BASE_EXPORT bool IsAccessibilityAXModesEnabled();

 #endif  // BUILDFLAG(IS_ANDROID)

 #if !BUILDFLAG(IS_ANDROID)
 AX_BASE_EXPORT BASE_DECLARE_FEATURE(kReadAnything);

 // Returns true if read anything is enabled. This feature shows users websites,
 // such as articles, in a comfortable reading experience in a side panel.
 AX_BASE_EXPORT bool IsReadAnythingEnabled();

 AX_BASE_EXPORT BASE_DECLARE_FEATURE(kReadAnythingWithScreen2x);

 // Returns true if read anything is enabled with screen2x integration, which
 // distills web pages using an ML model.
 AX_BASE_EXPORT bool IsReadAnythingWithScreen2xEnabled();

 // Returns true if Screen AI Service is needed as either
 // ScreenAIVisualAnnotations or ReadAnythingWithScreen2x are enabled.
 AX_BASE_EXPORT bool IsScreenAIServiceNeeded();

 // If enabled, ScreenAI library writes some debug data in /tmp.
 AX_BASE_EXPORT bool IsScreenAIDebugModeEnabled();

 // Enables a feature whereby inaccessible (i.e. untagged) PDFs are made
 // accessible using an optical character recognition service. Due to the size of
 // the OCR component, this feature targets desktop versions of Chrome for now.
 AX_BASE_EXPORT BASE_DECLARE_FEATURE(kPdfOcr);

 // Returns true if OCR will be performed on inaccessible (i.e. untagged) PDFs
 // and the resulting text, together with its layout information, will be added
 // to the accessibility tree.
 AX_BASE_EXPORT bool IsPdfOcrEnabled();

 // Enables a feature whereby inaccessible surfaces such as canvases are made
 // accessible using a local machine intelligence service.
 AX_BASE_EXPORT BASE_DECLARE_FEATURE(kLayoutExtraction);

 // Returns true if Layout Extraction feature is enabled. This feature uses a
 // local machine intelligence library to process screenshots and adds metadata
 // to the accessibility tree.
 AX_BASE_EXPORT bool IsLayoutExtractionEnabled();

 // Enables the experimental Accessibility Service.
 AX_BASE_EXPORT BASE_DECLARE_FEATURE(kAccessibilityService);

 // Returns true if the Accessibility Service enabled.
 AX_BASE_EXPORT bool IsAccessibilityServiceEnabled();

 #endif  // !BUILDFLAG(IS_ANDROID)

 }  // 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"

	namespace features {

	AX_BASE_EXPORT BASE_DECLARE_FEATURE(kEnableAccessibilityAriaVirtualContent);

	// Returns true if "aria-virtualcontent" should be recognized as a valid aria
	// property.
	AX_BASE_EXPORT bool IsAccessibilityAriaVirtualContentEnabled();

	AX_BASE_EXPORT BASE_DECLARE_FEATURE(kEnableAccessibilityExposeHTMLElement);

	// Returns true if the <html> element should be exposed to the
	// browser process AXTree (as an ignored node).
	AX_BASE_EXPORT bool IsAccessibilityExposeHTMLElementEnabled();

	AX_BASE_EXPORT BASE_DECLARE_FEATURE(kEnableAccessibilityExposeIgnoredNodes);

	// Returns true if all ignored nodes are exposed by Blink in the
	// accessibility tree.
	AX_BASE_EXPORT bool IsAccessibilityExposeIgnoredNodesEnabled();

	AX_BASE_EXPORT BASE_DECLARE_FEATURE(kEnableAccessibilityLanguageDetection);

	// Return true if language detection should be used to determine the language
	// of text content in page and exposed to the browser process AXTree.
	AX_BASE_EXPORT bool IsAccessibilityLanguageDetectionEnabled();

	// Serializes accessibility information from the Views tree and deserializes it
	// into an AXTree in the browser process.
	AX_BASE_EXPORT BASE_DECLARE_FEATURE(kEnableAccessibilityTreeForViews);

	// Returns true if the Views tree is exposed using an AXTree in the browser
	// process. Returns false if the Views tree is exposed to accessibility
	// directly.
	AX_BASE_EXPORT bool IsAccessibilityTreeForViewsEnabled();

	AX_BASE_EXPORT BASE_DECLARE_FEATURE(kEnableAccessibilityRestrictiveIA2AXModes);

	// Returns true if the more restrictive approach that only enables the web
	// content related AXModes on an IA2 query when the data is being queried on an
	// web content node.
	//
	// TODO(1441211): Remove flag once the change has been confirmed safe.
	AX_BASE_EXPORT bool IsAccessibilityRestrictiveIA2AXModesEnabled();

	AX_BASE_EXPORT BASE_DECLARE_FEATURE(kAccessibilityFocusHighlight);

	// Returns true if the accessibility focus highlight feature is enabled,
	// which draws a visual highlight around the focused element on the page
	// briefly whenever focus changes.
	AX_BASE_EXPORT bool IsAccessibilityFocusHighlightEnabled();

	AX_BASE_EXPORT BASE_DECLARE_FEATURE(kAutoDisableAccessibility);

	// Returns true if accessibility will be auto-disabled 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 bool IsAutoDisableAccessibilityEnabled();

	// Enables a setting that can turn on/off browser vocalization of 'descriptions'
	// tracks.
	AX_BASE_EXPORT BASE_DECLARE_FEATURE(kTextBasedAudioDescription);

	// Returns true if the setting to turn on text based audio descriptions is
	// enabled.
	AX_BASE_EXPORT bool IsTextBasedAudioDescriptionEnabled();

	// Returns true if the accessibility code should use experimental optimization
	// techniques in the AXTree::Unserialize method.
	AX_BASE_EXPORT bool IsUnserializeOptimizationsEnabled();

	// Enables an experimental implementation in AXTree for performance tests.
	AX_BASE_EXPORT BASE_DECLARE_FEATURE(kAccessibilityUnserializeOptimizations);

	#if BUILDFLAG(IS_WIN)
	// Enables an experimental Chrome-specific accessibility COM API
	AX_BASE_EXPORT BASE_DECLARE_FEATURE(kIChromeAccessible);

	// Returns true if the IChromeAccessible COM API is enabled.
	AX_BASE_EXPORT bool IsIChromeAccessibleEnabled();

	AX_BASE_EXPORT BASE_DECLARE_FEATURE(kSelectiveUIAEnablement);

	// Returns true if accessibility will be selectively enabled depending on the
	// UIA APIs that are called, allowing non-screenreader usage to enable less of
	// the accessibility system.
	AX_BASE_EXPORT bool IsSelectiveUIAEnablementEnabled();

	#endif // BUILDFLAG(IS_WIN)

	#if BUILDFLAG(IS_CHROMEOS_ASH)
	AX_BASE_EXPORT bool IsDictationOfflineAvailable();

	// Enables Context Checking with the accessibility Dictation feature.
	AX_BASE_EXPORT BASE_DECLARE_FEATURE(
	kExperimentalAccessibilityDictationContextChecking);

	// Returns true if Dictation with context checking is enabled.
	AX_BASE_EXPORT bool
	IsExperimentalAccessibilityDictationContextCheckingEnabled();

	// Enables downloading Google TTS voices using Language Packs.
	AX_BASE_EXPORT BASE_DECLARE_FEATURE(
	kExperimentalAccessibilityGoogleTtsLanguagePacks);

	// Returns true if using Language Packs to download Google TTS voices is
	// enabled.
	AX_BASE_EXPORT bool IsExperimentalAccessibilityGoogleTtsLanguagePacksEnabled();

	// Enables the experimental color enhancements settings.
	AX_BASE_EXPORT BASE_DECLARE_FEATURE(
	kExperimentalAccessibilityColorEnhancementSettings);

	// Returns true if the experimental color enhancements settings are enabled.
	AX_BASE_EXPORT bool
	AreExperimentalAccessibilityColorEnhancementSettingsEnabled();

	// Enables Select-to-Speak settings page migration from extension options page
	// to Chrome OS settings page.
	AX_BASE_EXPORT BASE_DECLARE_FEATURE(kAccessibilitySelectToSpeakPageMigration);

	// Returns true if Select-to-Speak settings page migration enabled.
	AX_BASE_EXPORT bool IsAccessibilitySelectToSpeakPageMigrationEnabled();

	// Enables ChromeVox settings page migration from extension options page to
	// Chrome OS settings page.
	AX_BASE_EXPORT BASE_DECLARE_FEATURE(kAccessibilityChromeVoxPageMigration);

	// Returns true if ChromeVox settings page migration is enabled.
	AX_BASE_EXPORT bool IsAccessibilityChromeVoxPageMigrationEnabled();

	// Enables AccessibilitySelectToSpeakPrefsMigration.
	AX_BASE_EXPORT BASE_DECLARE_FEATURE(kAccessibilitySelectToSpeakPrefsMigration);

	// Returns true if AccessibilitySelectToSpeakPrefsMigration enabled.
	AX_BASE_EXPORT bool IsAccessibilitySelectToSpeakPrefsMigrationEnabled();

	// Enables AccessibilitySelectToSpeakHoverTextImprovements.
	AX_BASE_EXPORT BASE_DECLARE_FEATURE(
	kAccessibilitySelectToSpeakHoverTextImprovements);

	// Returns true if AccessibilitySelectToSpeakHoverTextImprovements is enabled.
	AX_BASE_EXPORT bool IsAccessibilitySelectToSpeakHoverTextImprovementsEnabled();

	// Enables accessibility accelerator notifications to timeout.
	AX_BASE_EXPORT BASE_DECLARE_FEATURE(
	kAccessibilityAcceleratorNotificationsTimeout);

	// Returns true if kAccessibilityAcceleratorNotificationsTimeout is enabled.
	AX_BASE_EXPORT bool IsAccessibilityAcceleratorNotificationsTimeoutEnabled();

	// Enables the deprecation of ChromeVox tabs menu.
	AX_BASE_EXPORT BASE_DECLARE_FEATURE(kAccessibilityDeprecateChromeVoxTabs);

	// Returns true if kAccessibilityDeprecateChromeVoxTabs is enabled.
	AX_BASE_EXPORT bool IsAccessibilityDeprecateChromeVoxTabsEnabled();

	#endif // BUILDFLAG(IS_CHROMEOS_ASH)

	// Enables Get Image Descriptions to augment existing images labels,
	// rather than only provide descriptions for completely unlabeled images.
	AX_BASE_EXPORT BASE_DECLARE_FEATURE(kAugmentExistingImageLabels);

	// Returns true if augmenting existing image labels is enabled.
	AX_BASE_EXPORT bool IsAugmentExistingImageLabelsEnabled();

	// Once this flag is enabled, a single codebase in AXPosition will be used for
	// handling document markers on all platforms, including the announcement of
	// spelling mistakes.
	AX_BASE_EXPORT BASE_DECLARE_FEATURE(kUseAXPositionForDocumentMarkers);

	// Returns true if document markers are exposed on inline text boxes in the
	// accessibility tree in addition to on static text nodes. This in turn enables
	// AXPosition on the browser to discover and work with document markers, instead
	// of the legacy code that collects document markers manually from static text
	// nodes and which is different for each platform.
	AX_BASE_EXPORT bool IsUseAXPositionForDocumentMarkersEnabled();

	// Enable support for ARIA element reflection, for example
	// element.ariaActiveDescendantElement = child;
	AX_BASE_EXPORT BASE_DECLARE_FEATURE(kEnableAriaElementReflection);

	// Returns true if ARIA element reflection is enabled.
	AX_BASE_EXPORT bool IsAriaElementReflectionEnabled();

	// Experiment to increase the cost of SendPendingAccessibilityEvents.
	AX_BASE_EXPORT BASE_DECLARE_FEATURE(kAblateSendPendingAccessibilityEvents);

	// Returns true if \|kAblateSendPendingAccessibilityEvents\| is enabled.
	AX_BASE_EXPORT bool IsAblateSendPendingAccessibilityEventsEnabled();

	#if BUILDFLAG(IS_ANDROID)
	// Enable AXModes based on running services. If disabled, then AXModes
	// will not be available to be set.
	AX_BASE_EXPORT BASE_DECLARE_FEATURE(kAccessibilityAXModes);

	// Returns true if AXMode is enabled.
	AX_BASE_EXPORT bool IsAccessibilityAXModesEnabled();

	#endif // BUILDFLAG(IS_ANDROID)

	#if !BUILDFLAG(IS_ANDROID)
	AX_BASE_EXPORT BASE_DECLARE_FEATURE(kReadAnything);

	// Returns true if read anything is enabled. This feature shows users websites,
	// such as articles, in a comfortable reading experience in a side panel.
	AX_BASE_EXPORT bool IsReadAnythingEnabled();

	AX_BASE_EXPORT BASE_DECLARE_FEATURE(kReadAnythingWithScreen2x);

	// Returns true if read anything is enabled with screen2x integration, which
	// distills web pages using an ML model.
	AX_BASE_EXPORT bool IsReadAnythingWithScreen2xEnabled();

	// Returns true if Screen AI Service is needed as either
	// ScreenAIVisualAnnotations or ReadAnythingWithScreen2x are enabled.
	AX_BASE_EXPORT bool IsScreenAIServiceNeeded();

	// If enabled, ScreenAI library writes some debug data in /tmp.
	AX_BASE_EXPORT bool IsScreenAIDebugModeEnabled();

	// Enables a feature whereby inaccessible (i.e. untagged) PDFs are made
	// accessible using an optical character recognition service. Due to the size of
	// the OCR component, this feature targets desktop versions of Chrome for now.
	AX_BASE_EXPORT BASE_DECLARE_FEATURE(kPdfOcr);

	// Returns true if OCR will be performed on inaccessible (i.e. untagged) PDFs
	// and the resulting text, together with its layout information, will be added
	// to the accessibility tree.
	AX_BASE_EXPORT bool IsPdfOcrEnabled();

	// Enables a feature whereby inaccessible surfaces such as canvases are made
	// accessible using a local machine intelligence service.
	AX_BASE_EXPORT BASE_DECLARE_FEATURE(kLayoutExtraction);

	// Returns true if Layout Extraction feature is enabled. This feature uses a
	// local machine intelligence library to process screenshots and adds metadata
	// to the accessibility tree.
	AX_BASE_EXPORT bool IsLayoutExtractionEnabled();

	// Enables the experimental Accessibility Service.
	AX_BASE_EXPORT BASE_DECLARE_FEATURE(kAccessibilityService);

	// Returns true if the Accessibility Service enabled.
	AX_BASE_EXPORT bool IsAccessibilityServiceEnabled();

	#endif // !BUILDFLAG(IS_ANDROID)

	} // namespace features

	#endif // UI_ACCESSIBILITY_ACCESSIBILITY_FEATURES_H_