Migrate accessibility from RenderView to RenderFrame.

content/renderer/accessibility/renderer_accessibility.cc

Index: content/renderer/accessibility/renderer_accessibility.cc
diff --git a/content/renderer/accessibility/renderer_accessibility.cc b/content/renderer/accessibility/renderer_accessibility.cc
index 1f2d69617e46a87188a6782de06140a2da3d3e63..519b222e7b6847e36b104781e087ebe867bfc08e 100644
--- a/content/renderer/accessibility/renderer_accessibility.cc
+++ b/content/renderer/accessibility/renderer_accessibility.cc
@@ -5,6 +5,7 @@
 #include "content/renderer/accessibility/renderer_accessibility.h"
 
 #include "base/command_line.h"
+#include "content/renderer/render_frame_impl.h"
 #include "content/renderer/render_view_impl.h"
 #include "third_party/WebKit/public/web/WebAXObject.h"
 #include "third_party/WebKit/public/web/WebDocument.h"
@@ -19,16 +20,16 @@ using blink::WebView;
 namespace content {
 
 RendererAccessibility::RendererAccessibility(
-    RenderViewImpl* render_view)
-    : RenderViewObserver(render_view),
-      render_view_(render_view) {
+    RenderFrameImpl* render_frame)
+    : RenderFrameObserver(render_frame),
+      render_frame_(render_frame) {
 }
 
 RendererAccessibility::~RendererAccessibility() {
 }
 
 WebDocument RendererAccessibility::GetMainDocument() {
-  WebView* view = render_view()->GetWebView();
+  WebView* view = render_frame_->render_view()->GetWebView();
   WebFrame* main_frame = view ? view->mainFrame() : NULL;
 
   if (main_frame)