Make PageScaleFactor work for oopif subframes.

content/browser/frame_host/render_frame_host_impl.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_BROWSER_FRAME_HOST_RENDER_FRAME_HOST_IMPL_H_
 #define CONTENT_BROWSER_FRAME_HOST_RENDER_FRAME_HOST_IMPL_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 741 matching lines @@
   void OnSetHasReceivedUserGesture();
 
 #if defined(USE_EXTERNAL_POPUP_MENU)
   void OnShowPopup(const FrameHostMsg_ShowPopup_Params& params);
   void OnHidePopup();
 #endif
   void OnShowCreatedWindow(int pending_widget_routing_id,
                            WindowOpenDisposition disposition,
                            const gfx::Rect& initial_rect,
                            bool user_gesture);
+  void OnSetPageScaleFactorForSubframes(double page_scale_factor);
 
   // Registers Mojo interfaces that this frame host makes available.
   void RegisterMojoInterfaces();
 
   // Resets any waiting state of this RenderFrameHost that is no longer
   // relevant.
   void ResetWaitingState();
 
   // Returns whether the given URL is allowed to commit in the current process.
   // This is a more conservative check than RenderProcessHost::FilterURL, since
@@ skipping 369 matching lines @@
 
   // NOTE: This must be the last member.
   base::WeakPtrFactory<RenderFrameHostImpl> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderFrameHostImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_FRAME_HOST_RENDER_FRAME_HOST_IMPL_H_