Migrate accessibility from RenderView to RenderFrame.

content/browser/renderer_host/render_widget_host_delegate.h

Index: content/browser/renderer_host/render_widget_host_delegate.h
diff --git a/content/browser/renderer_host/render_widget_host_delegate.h b/content/browser/renderer_host/render_widget_host_delegate.h
index 983f2824cd8a7a53f38c73ab734a59679843fe33..57457f45ed4c2dfd0efa18255a8cc7c7ad14edd6 100644
--- a/content/browser/renderer_host/render_widget_host_delegate.h
+++ b/content/browser/renderer_host/render_widget_host_delegate.h
@@ -7,7 +7,6 @@
 
 #include "build/build_config.h"
 #include "content/common/content_export.h"
-#include "ui/gfx/native_widget_types.h"
 
 namespace blink {
 class WebMouseWheelEvent;
@@ -16,6 +15,7 @@ class WebGestureEvent;
 
 namespace content {
 
+class BrowserAccessibilityManager;
 class RenderWidgetHostImpl;
 struct NativeWebKeyboardEvent;
 
@@ -59,10 +59,8 @@ class CONTENT_EXPORT RenderWidgetHostDelegate {
   // Notifies that screen rects were sent to renderer process.
   virtual void DidSendScreenRects(RenderWidgetHostImpl* rwh) {}
 
-#if defined(OS_WIN)
-  // Returns the widget's parent's NativeViewAccessible.
-  virtual gfx::NativeViewAccessible GetParentNativeViewAccessible();
-#endif
+  // Get the root BrowserAccessibilityManager for this frame tree.
+  virtual BrowserAccessibilityManager* GetRootBrowserAccessibilityManager();
 
  protected:
   virtual ~RenderWidgetHostDelegate() {}