Support tracking focused node element for OOPIFs.

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 e9667981ec6ec0426901568d8db38a04f3068e54..f0f8bc3a0969a5e72e2afb15d99ba49d1e8df889 100644
--- a/content/browser/frame_host/render_frame_host_impl.h
+++ b/content/browser/frame_host/render_frame_host_impl.h
@@ -567,12 +567,18 @@ class CONTENT_EXPORT RenderFrameHostImpl
 
   void SetHasReceivedUserGesture();
 
+  void ClearFocusedElement();
+
   // PlzNavigate: returns the LoFi state of the last successful navigation that
   // made a network request.
   LoFiState last_navigation_lofi_state() const {
     return last_navigation_lofi_state_;
   }
 
+  bool has_focused_editable_element() const {
+    return has_focused_editable_element_;
+  }
+
  protected:
   friend class RenderFrameHostFactory;
 
@@ -699,6 +705,8 @@ class CONTENT_EXPORT RenderFrameHostImpl
   void OnSelectionChanged(const base::string16& text,
                           uint32_t offset,
                           const gfx::Range& range);
+  void OnFocusedNodeChanged(bool is_editable_element,
+                            const gfx::Rect& bounds_in_frame_widget);
 
 #if defined(USE_EXTERNAL_POPUP_MENU)
   void OnShowPopup(const FrameHostMsg_ShowPopup_Params& params);
@@ -1049,6 +1057,9 @@ class CONTENT_EXPORT RenderFrameHostImpl
   // requests should be queued.
   bool waiting_for_init_;
 
+  // If true then this frame's document has a focused element which is editable.
+  bool has_focused_editable_element_;
+
   typedef std::pair<CommonNavigationParams, BeginNavigationParams>
       PendingNavigation;
   std::unique_ptr<PendingNavigation> pendinging_navigate_;