Revert 207755 "Add device policies to control accessibility sett..."

BUG=252670
TBR=bartfab@chromium.org

> Add device policies to control accessibility settings on the login screen
> 
> This CL adds device policies that provide control over the default state
> of the following four accessibility settings on the login screen:
> * Large cursor
> * Spoken feedback
> * High contrast mode
> * Screen magnifier type
> 
> The User can temporarily override the settings but the defaults are
> restored whenever the login screen is shown anew or the user remains idle
> on the login screen for one minute.
> 
> BUG=225955, 225956, 243350, 247298
> TEST=New unittests + new browsertests + manual in VM
> 
> Review URL: https://chromiumcodereview.appspot.com/16658015

TBR=bartfab@chromium.org

Review URL: https://codereview.chromium.org/17068004

git-svn-id: http://src.chromium.org/svn/trunk/src/chrome/browser/policy/proto@207799 4ff67af0-8c30-449e-8e8b-ad334ec8d88c
diff --git a/chromeos/chrome_device_policy.proto b/chromeos/chrome_device_policy.proto
index 2ba6519..5d83a8a 100644
--- a/chromeos/chrome_device_policy.proto
+++ b/chromeos/chrome_device_policy.proto
@@ -347,67 +347,6 @@
   optional bool attestation_enabled = 1;
 }
 
-message AccessibilitySettingsProto {
-  // Sets the default state of the large cursor accessibility feature on the
-  // login screen. If this policy is set to true, the large cursor will be
-  // enabled when the login screen is shown. If this policy is set to false, the
-  // large cursor will be disabled when the login screen is shown. Users can
-  // temporarily override this setting by enabling or disabling the large
-  // cursor. However, the user's choice is not persistent and the default is
-  // restored whenever the login screen is shown anew or the user remains idle
-  // on the login screen for a minute. If this policy is left unset, the large
-  // cursor is disabled when the login screen is first shown. Users can enable
-  // or disable the large cursor anytime and its status on the login screen is
-  // persisted between users.
-  optional bool login_screen_default_large_cursor_enabled = 1;
-
-  // Sets the default state of the spoken feedback accessibility feature on the
-  // login screen. If this policy is set to true, spoken feedback will be
-  // enabled when the login screen is shown. If this policy is set to false,
-  // spoken feedback will be disabled when the login screen is shown. Users can
-  // temporarily override this setting by enabling or disabling spoken feedback.
-  // However, the user's choice is not persistent and the default is restored
-  // whenever the login screen is shown anew or the user remains idle on the
-  // login screen for a minute. If this policy is left unset, spoken feedback is
-  // disabled when the login screen is first shown. Users can enable or disable
-  // spoken feedback anytime and its status on the login screen is persisted
-  // between users.
-  optional bool login_screen_default_spoken_feedback_enabled = 2;
-
-  // Sets the default state of the high contrast mode accessibility feature on
-  // the login screen. If this policy is set to true, high contrast mode will be
-  // enabled when the login screen is shown. If this policy is set to false,
-  // high contrast mode will be disabled when the login screen is shown. Users
-  // can temporarily override this setting by enabling or disabling high
-  // contrast mode. However, the user's choice is not persistent and the default
-  // is restored whenever the login screen is shown anew or the user remains
-  // idle on the login screen for a minute. If this policy is left unset, high
-  // contrast mode is disabled when the login screen is first shown. Users can
-  // enable or disable high contrast mode anytime and its status on the login
-  // screen is persisted between users.
-  optional bool login_screen_default_high_contrast_enabled = 3;
-
-  // Enumerates the screen magnifier types.
-  enum ScreenMagnifierType {
-    // Screen magnifier disabled.
-    SCREEN_MAGNIFIER_TYPE_NONE = 0;
-    // Full-screen magnifier enabled.
-    SCREEN_MAGNIFIER_TYPE_FULL = 1;
-  };
-
-  // Sets the default type of screen magnifier that is enabled on the login
-  // screen. If this policy is set, it controls the type of screen magnifier
-  // that is enabled when the login screen is shown. Users can temporarily
-  // override this setting by enabling or disabling the screen magnifier.
-  // However, the user's choice is not persistent and the default is restored
-  // whenever the login screen is shown anew or the user remains idle on the
-  // login screen for a minute. If this policy is left unset, the screen
-  // magnifier is disabled when the login screen is first shown. Users can
-  // enable or disable the screen magnifier anytime and its status on the login
-  // screen is persisted between users.
-  optional ScreenMagnifierType login_screen_default_screen_magnifier_type = 4;
-}
-
 message ChromeDeviceSettingsProto {
   optional DevicePolicyRefreshRateProto device_policy_refresh_rate = 1;
   optional UserWhitelistProto user_whitelist = 2;
@@ -435,5 +374,4 @@
   optional UptimeLimitProto uptime_limit = 24;
   optional VariationsParameterProto variations_parameter = 25;
   optional AttestationSettingsProto attestation_settings = 26;
-  optional AccessibilitySettingsProto accessibility_settings = 27;
 }