Make document.activeElement work with OOPIF

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 c2bc78d2f8ddea0e3597663fdea3163210e36d68..6585f634119f256249c7a4d587c38dc38ca6bb8d 100644
--- a/content/browser/frame_host/render_frame_host_impl.h
+++ b/content/browser/frame_host/render_frame_host_impl.h
@@ -375,8 +375,10 @@ class CONTENT_EXPORT RenderFrameHostImpl
   // another renderer process.
   void UpdateOpener();
 
-  // Clear focus from this frame in the renderer process.
-  void ClearFocus();
+  // Clear focus from this frame in the renderer process and set |focused_ftn|
+  // as the new focused frame.  This is only called when |focused_ftn| is in a
+  // different process from this frame.
+  void ClearFocus(FrameTreeNode* focused_ftn);
 
   // Deletes the current selection plus the specified number of characters
   // before and after the selection or caret.