Make Windows accessibility event firing aware of guest / child frames.

content/browser/frame_host/render_frame_host_impl.h

Index: content/browser/frame_host/render_frame_host_impl.h
diff --git a/content/browser/frame_host/render_frame_host_impl.h b/content/browser/frame_host/render_frame_host_impl.h
index e0fa87fa49bcba9d35da5676f8209afd761fb55c..a3970834ba6e1c85f5c18b626fc778b567fd47f6 100644
--- a/content/browser/frame_host/render_frame_host_impl.h
+++ b/content/browser/frame_host/render_frame_host_impl.h
@@ -162,6 +162,8 @@ class CONTENT_EXPORT RenderFrameHostImpl
   gfx::NativeViewAccessible AccessibilityGetNativeViewAccessible() override;
   BrowserAccessibilityManager* AccessibilityGetChildFrame(
       int accessibility_node_id) override;
+  void AccessibilityGetAllChildFrames(
+      std::vector<BrowserAccessibilityManager*>* child_frames) override;
   BrowserAccessibility* AccessibilityGetParentFrame() override;
 
   // Creates a RenderFrame in the renderer process.  Only called for
@@ -495,6 +497,11 @@ class CONTENT_EXPORT RenderFrameHostImpl
   void UpdateGuestFrameAccessibility(
       const std::map<int32, int>& node_to_browser_plugin_instance_id_map);
 
+  // Asserts that the given RenderFrameHostImpl is part of the same browser
+  // context (and crashes if not), then returns whether the given frame is
+  // part of the same site instance.
+  bool IsSameSiteInstance(RenderFrameHostImpl* other_render_frame_host);
+
   // Informs the content client that geolocation permissions were used.
   void DidUseGeolocationPermission();