Switch AccessibilityMode to be a bitmap

content/browser/renderer_host/render_widget_host_impl.h

 // Copyright (c) 2012 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 CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_IMPL_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_IMPL_H_
 
 #include <deque>
 #include <list>
 #include <map>
@@ skipping 374 matching lines @@
 
   // Set the RenderView background.
   void SetBackground(const SkBitmap& background);
 
   // Notifies the renderer that the next key event is bound to one or more
   // pre-defined edit commands
   void SetEditCommandsForNextKeyEvent(
       const std::vector<EditCommand>& commands);
 
   // Gets the accessibility mode.
-  AccessibilityMode accessibility_mode() const {
+  unsigned int accessibility_mode() const {
     return accessibility_mode_;
   }
 
-  // Send a message to the renderer process to change the accessibility mode.
-  void SetAccessibilityMode(AccessibilityMode mode);
+  // Adds the given accessibility mode to the current accessibility mode bitmap.
+  void AddAccessibilityMode(AccessibilityMode mode);
+
+  // Removes the given accessibility mode from the current accessibility mode
+  // bitmap, managing the bits that are shared with other modes such that a
+  // bit will only be turned off when all modes that depend on it have been
+  // removed.
+  void RemoveAccessibilityMode(AccessibilityMode mode);
 
   // Relay a request from assistive technology to perform the default action
   // on a given node.
   void AccessibilityDoDefaultAction(int object_id);
 
   // Relay a request from assistive technology to set focus to a given node.
   void AccessibilitySetFocus(int object_id);
 
   // Relay a request from assistive technology to make a given object
   // visible by scrolling as many scrollable containers as necessary.
@@ skipping 340 matching lines @@
   virtual void OnGestureEventAck(const GestureEventWithLatencyInfo& event,
                                  InputEventAckState ack_result) OVERRIDE;
   virtual void OnUnexpectedEventAck(UnexpectedEventAckType type) OVERRIDE;
 
   // Called when there is a new auto resize (using a post to avoid a stack
   // which may get in recursive loops).
   void DelayedAutoResized();
 
   void WindowSnapshotReachedScreen(int snapshot_id);
 
+  // Send a message to the renderer process to change the accessibility mode.
+  void SetAccessibilityMode(unsigned int AccessibilityMode);
+
   // Our delegate, which wants to know mainly about keyboard events.
   // It will remain non-NULL until DetachDelegate() is called.
   RenderWidgetHostDelegate* delegate_;
 
   // Created during construction but initialized during Init*(). Therefore, it
   // is guaranteed never to be NULL, but its channel may be NULL if the
   // renderer crashed, so you must always check that.
   RenderProcessHost* process_;
 
   // The ID of the corresponding object in the Renderer Instance.
@@ skipping 52 matching lines @@
   gfx::Size new_auto_size_;
 
   // True if the render widget host should track the render widget's size as
   // opposed to visa versa.
   bool should_auto_resize_;
 
   bool waiting_for_screen_rects_ack_;
   gfx::Rect last_view_screen_rect_;
   gfx::Rect last_window_screen_rect_;
 
-  AccessibilityMode accessibility_mode_;
+  unsigned int accessibility_mode_;
 
   // Keyboard event listeners.
   std::vector<KeyPressEventCallback> key_press_event_callbacks_;
 
   // Mouse event callbacks.
   std::vector<MouseEventCallback> mouse_event_callbacks_;
 
   // If true, then we should repaint when restoring even if we have a
   // backingstore.  This flag is set to true if we receive a paint message
   // while is_hidden_ to true.  Even though we tell the render widget to hide
@@ skipping 89 matching lines @@
   int64 last_input_number_;
 
   BrowserRenderingStats rendering_stats_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_IMPL_H_