Avoid unnecessary LocalSurfaceId allocation in RenderWidgetHostViewChildFrame/Guest

content/browser/frame_host/render_widget_host_view_guest.h

 // Copyright 2014 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_WIDGET_HOST_VIEW_GUEST_H_
 #define CONTENT_BROWSER_FRAME_HOST_RENDER_WIDGET_HOST_VIEW_GUEST_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 107 matching lines @@
 
   void WheelEventAck(const blink::WebMouseWheelEvent& event,
                      InputEventAckState ack_result) override;
 
   void GestureEventAck(const blink::WebGestureEvent& event,
                        InputEventAckState ack_result) override;
 
   bool IsRenderWidgetHostViewGuest() override;
   RenderWidgetHostViewBase* GetOwnerRenderWidgetHostView() const;
 
- protected:
+ private:
   friend class RenderWidgetHostView;
-  bool ShouldCreateNewSurfaceId(uint32_t compositor_frame_sink_id,
-                                const cc::CompositorFrame& frame) override;
 
- private:
   void SendSurfaceInfoToEmbedderImpl(
       const cc::SurfaceInfo& surface_info,
       const cc::SurfaceSequence& sequence) override;
 
   RenderWidgetHostViewGuest(
       RenderWidgetHost* widget,
       BrowserPluginGuest* guest,
       base::WeakPtr<RenderWidgetHostViewBase> platform_view);
 
   // Since we now route GestureEvents directly to the guest renderer, we need
   // a way to make sure that the BrowserPlugin in the embedder gets focused so
   // that keyboard input (which still travels via BrowserPlugin) is routed to
   // the plugin and thus onwards to the guest.
   // TODO(wjmaclean): When we remove BrowserPlugin, delete this code.
   // http://crbug.com/533069
   void MaybeSendSyntheticTapGesture(
       const blink::WebFloatPoint& position,
       const blink::WebFloatPoint& screenPosition) const;
 
   void OnHandleInputEvent(RenderWidgetHostImpl* embedder,
                           int browser_plugin_instance_id,
                           const blink::WebInputEvent* event);
 
+  bool HasEmbedderChanged() override;
+
   // BrowserPluginGuest and RenderWidgetHostViewGuest's lifetimes are not tied
   // to one another, therefore we access |guest_| through WeakPtr.
   base::WeakPtr<BrowserPluginGuest> guest_;
   gfx::Size size_;
   // The platform view for this RenderWidgetHostView.
   // RenderWidgetHostViewGuest mostly only cares about stuff related to
   // compositing, the rest are directly forwarded to this |platform_view_|.
   base::WeakPtr<RenderWidgetHostViewBase> platform_view_;
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostViewGuest);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_FRAME_HOST_RENDER_WIDGET_HOST_VIEW_GUEST_H_