Revert of Migrate accessibility from RenderView to RenderFrame.

content/renderer/accessibility/renderer_accessibility.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_RENDERER_ACCESSIBILITY_RENDERER_ACCESSIBILITY_H_
 #define CONTENT_RENDERER_ACCESSIBILITY_RENDERER_ACCESSIBILITY_H_
 
 #include "content/common/accessibility_messages.h"
-#include "content/public/renderer/render_frame_observer.h"
+#include "content/public/renderer/render_view_observer.h"
 #include "third_party/WebKit/public/web/WebAXObject.h"
 
 namespace blink {
 class WebDocument;
 };
 
 namespace content {
-class RenderFrameImpl;
+class RenderViewImpl;
 
 enum RendererAccessibilityType {
   // Turns on Blink accessibility and provides a full accessibility
   // implementation for when assistive technology is running.
   RendererAccessibilityTypeComplete,
 
   // Does not turn on Blink accessibility. Only sends a minimal accessible tree
   // to the browser whenever focus changes. This mode is currently used to
   // support opening the on-screen keyboard in response to touch events on
   // Windows 8 in Metro mode.
   RendererAccessibilityTypeFocusOnly
 };
 
 // The browser process implement native accessibility APIs, allowing
 // assistive technology (e.g., screen readers, magnifiers) to access and
 // control the web contents with high-level APIs. These APIs are also used
 // by automation tools, and Windows 8 uses them to determine when the
 // on-screen keyboard should be shown.
 //
-// An instance of this class (or rather, a subclass) belongs to RenderFrameImpl.
+// An instance of this class (or rather, a subclass) belongs to RenderViewImpl.
 // Accessibility is initialized based on the AccessibilityMode of
-// RenderFrameImpl; it lazily starts as Off or EditableTextOnly depending on
+// RenderViewImpl; it lazily starts as Off or EditableTextOnly depending on
 // the operating system, and switches to Complete if assistive technology is
 // detected or a flag is set.
 //
 // A tree of accessible objects is built here and sent to the browser process;
 // the browser process maintains this as a tree of platform-native
 // accessible objects that can be used to respond to accessibility requests
 // from other processes.
 //
 // This base class just contains common code and will not do anything by itself.
 // The two subclasses are:
 //
 //   RendererAccessibilityComplete - turns on Blink accessibility and
 //       provides a full accessibility implementation for when
 //       assistive technology is running.
 //
 //   RendererAccessibilityFocusOnly - does not turn on Blink
 //       accessibility. Only sends a minimal accessible tree to the
 //       browser whenever focus changes. This mode is currently used
 //       to support opening the on-screen keyboard in response to
 //       touch events on Windows 8 in Metro mode.
 //
-class CONTENT_EXPORT RendererAccessibility : public RenderFrameObserver {
+class CONTENT_EXPORT RendererAccessibility : public RenderViewObserver {
  public:
-  explicit RendererAccessibility(RenderFrameImpl* render_frame);
+  explicit RendererAccessibility(RenderViewImpl* render_view);
   virtual ~RendererAccessibility();
 
   // Called when an accessibility notification occurs in Blink.
   virtual void HandleWebAccessibilityEvent(
       const blink::WebAXObject& obj, blink::WebAXEvent event) = 0;
-  virtual void FocusedNodeChanged(const blink::WebNode& node) = 0;
 
   // Gets the type of this RendererAccessibility object. Primarily intended for
   // testing.
   virtual RendererAccessibilityType GetType() = 0;
 
  protected:
   // Returns the main top-level document for this page, or NULL if there's
   // no view or frame.
   blink::WebDocument GetMainDocument();
 
-  // The RenderFrameImpl that owns us.
-  RenderFrameImpl* render_frame_;
+  // The RenderViewImpl that owns us.
+  RenderViewImpl* render_view_;
 
   DISALLOW_COPY_AND_ASSIGN(RendererAccessibility);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_ACCESSIBILITY_RENDERER_ACCESSIBILITY_H_