Add 5 experimental accessibility features on Chrome OS.

ash/accessibility_delegate.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef ASH_ACCESSIBILITY_DELEGATE_H_
 #define ASH_ACCESSIBILITY_DELEGATE_H_
 
 #include "ash/ash_export.h"
 #include "base/time/time.h"
 #include "ui/chromeos/accessibility_types.h"
@@ skipping 41 matching lines @@
 
   // Returns if autoclick is enabled or not.
   virtual bool IsAutoclickEnabled() const = 0;
 
   // Invoked to enable or disable the a11y on-screen keyboard.
   virtual void SetVirtualKeyboardEnabled(bool enabled) = 0;
 
   // Returns if the a11y virtual keyboard is enabled.
   virtual bool IsVirtualKeyboardEnabled() const = 0;
 
+  // Invoked to enable or disable caret highlighting.
+  virtual void SetCaretHighlightEnabled(bool enabled) = 0;
+
+  // Returns if caret highlighting is enabled.
+  virtual bool IsCaretHighlightEnabled() const = 0;
+
+  // Invoked to enable or disable cursor highlighting.
+  virtual void SetCursorHighlightEnabled(bool enabled) = 0;
+
+  // Returns if cursor highlighting is enabled.
+  virtual bool IsCursorHighlightEnabled() const = 0;
+
+  // Invoked to enable or disable focus highlighting.
+  virtual void SetFocusHighlightEnabled(bool enabled) = 0;
+
+  // Returns if focus highlighting is enabled.
+  virtual bool IsFocusHighlightEnabled() const = 0;
+
+  // Invoked to enable or disable select-to-speak.
+  virtual void SetSelectToSpeakEnabled(bool enabled) = 0;
+
+  // Returns if select-to-speak is enabled.
+  virtual bool IsSelectToSpeakEnabled() const = 0;
+
+  // Invoked to enable or disable switch access.
+  virtual void SetSwitchAccessEnabled(bool enabled) = 0;
+
+  // Returns if switch access is enabled.
+  virtual bool IsSwitchAccessEnabled() const = 0;
+
   // Returns true when the accessibility menu should be shown.
   virtual bool ShouldShowAccessibilityMenu() const = 0;
 
   // Returns true if a braille display is connected to the system.
   virtual bool IsBrailleDisplayConnected() const = 0;
 
   // Cancel all current and queued speech immediately.
   virtual void SilenceSpokenFeedback() const = 0;
 
   // Saves the zoom scale of the full screen magnifier.
@@ skipping 14 matching lines @@
   // chromeos/audio/chromeos_sounds.h.
   virtual void PlayEarcon(int sound_key) = 0;
 
   // Initiates play of shutdown sound and returns it's duration.
   virtual base::TimeDelta PlayShutdownSound() const = 0;
 };
 
 }  // namespace ash
 
 #endif  // ASH_ACCESSIBILITY_DELEGATE_H_