Revert of Revert of Migrate accessibility from RenderView to RenderFrame.

content/renderer/render_view_impl.cc

Index: content/renderer/render_view_impl.cc
diff --git a/content/renderer/render_view_impl.cc b/content/renderer/render_view_impl.cc
index 4aeb478c8218af39b7ceed9f72c936913e089f18..13d98cafc042139cdec9a803a2211d0c308399d6 100644
--- a/content/renderer/render_view_impl.cc
+++ b/content/renderer/render_view_impl.cc
@@ -727,8 +727,6 @@
       speech_recognition_dispatcher_(NULL),
       browser_plugin_manager_(NULL),
       devtools_agent_(NULL),
-      accessibility_mode_(AccessibilityModeOff),
-      renderer_accessibility_(NULL),
       mouse_lock_dispatcher_(NULL),
 #if defined(OS_ANDROID)
       expected_content_intent_id_(0),
@@ -860,9 +858,6 @@
   mouse_lock_dispatcher_ = new RenderViewMouseLockDispatcher(this);
 
   history_controller_.reset(new HistoryController(this));
-
-  // Create renderer_accessibility_ if needed.
-  OnSetAccessibilityMode(params->accessibility_mode);
 
   new IdleUserDetector(this);
 
@@ -1206,8 +1201,7 @@
     bool hidden,
     bool never_visible,
     int32 next_page_id,
-    const blink::WebScreenInfo& screen_info,
-    AccessibilityMode accessibility_mode) {
+    const blink::WebScreenInfo& screen_info) {
   DCHECK(routing_id != MSG_ROUTING_NONE);
   RenderViewImplParams params(opener_id,
                               window_was_created_with_opener,
@@ -1224,8 +1218,7 @@
                               hidden,
                               never_visible,
                               next_page_id,
-                              screen_info,
-                              accessibility_mode);
+                              screen_info);
   RenderViewImpl* render_view = NULL;
   if (g_create_render_view_impl)
     render_view = g_create_render_view_impl(&params);
@@ -1413,7 +1406,6 @@
     IPC_MESSAGE_HANDLER(ViewMsg_SetHistoryLengthAndPrune,
                         OnSetHistoryLengthAndPrune)
     IPC_MESSAGE_HANDLER(ViewMsg_EnableViewSourceMode, OnEnableViewSourceMode)
-    IPC_MESSAGE_HANDLER(ViewMsg_SetAccessibilityMode, OnSetAccessibilityMode)
     IPC_MESSAGE_HANDLER(ViewMsg_DisownOpener, OnDisownOpener)
     IPC_MESSAGE_HANDLER(ViewMsg_ReleaseDisambiguationPopupBitmap,
                         OnReleaseDisambiguationPopupBitmap)
@@ -1755,8 +1747,7 @@
       params.disposition == NEW_BACKGROUND_TAB,  // hidden
       never_visible,
       1,  // next_page_id
-      screen_info_,
-      accessibility_mode_);
+      screen_info_);
   view->opened_by_user_gesture_ = params.user_gesture;
 
   // Record whether the creator frame is trying to suppress the opener field.
@@ -2040,6 +2031,9 @@
   Send(new ViewHostMsg_FocusedNodeChanged(routing_id_, IsEditableNode(node)));
 
   FOR_EACH_OBSERVER(RenderViewObserver, observers_, FocusedNodeChanged(node));
+
+  // TODO(dmazzoni): this should be part of RenderFrameObserver.
+  main_render_frame()->FocusedNodeChanged(node);
 }
 
 void RenderViewImpl::didUpdateLayout() {
@@ -2072,9 +2066,7 @@
 
 void RenderViewImpl::postAccessibilityEvent(
     const WebAXObject& obj, blink::WebAXEvent event) {
-  if (renderer_accessibility_) {
-    renderer_accessibility_->HandleWebAccessibilityEvent(obj, event);
-  }
+  main_render_frame()->HandleWebAccessibilityEvent(obj, event);
 }
 
 void RenderViewImpl::didUpdateInspectorSetting(const WebString& key,
@@ -3421,25 +3413,6 @@
     compositor_->setHasTransparentBackground(!opaque);
 }
 
-void RenderViewImpl::OnSetAccessibilityMode(AccessibilityMode new_mode) {
-  if (accessibility_mode_ == new_mode)
-    return;
-  accessibility_mode_ = new_mode;
-  if (renderer_accessibility_) {
-    delete renderer_accessibility_;
-    renderer_accessibility_ = NULL;
-  }
-  if (accessibility_mode_ == AccessibilityModeOff)
-    return;
-
-  if (accessibility_mode_ & AccessibilityModeFlagFullTree)
-    renderer_accessibility_ = new RendererAccessibilityComplete(this);
-#if !defined(OS_ANDROID)
-  else
-    renderer_accessibility_ = new RendererAccessibilityFocusOnly(this);
-#endif
-}
-
 void RenderViewImpl::OnSetActive(bool active) {
   if (webview())
     webview()->setIsActive(active);
@@ -4134,10 +4107,12 @@
     const WebVector<WebRect>& target_rects) {
   // Never show a disambiguation popup when accessibility is enabled,
   // as this interferes with "touch exploration".
-  bool matchesAccessibilityModeComplete =
-      (accessibility_mode_ & AccessibilityModeComplete) ==
-      AccessibilityModeComplete;
-  if (matchesAccessibilityModeComplete)
+  AccessibilityMode accessibility_mode =
+      main_render_frame()->accessibility_mode();
+  bool matches_accessibility_mode_complete =
+      (accessibility_mode & AccessibilityModeComplete) ==
+          AccessibilityModeComplete;
+  if (matches_accessibility_mode_complete)
     return false;
 
   gfx::Rect finger_rect(