Add IPC messages to transfer compositor protos

content/browser/renderer_host/render_widget_host_delegate.h

 // Copyright (c) 2012 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_RENDERER_HOST_RENDER_WIDGET_HOST_DELEGATE_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_DELEGATE_H_
 
 #include "base/basictypes.h"
 #include "build/build_config.h"
 #include "content/common/content_export.h"
@@ skipping 145 matching lines @@
   // Notification that the widget has lost capture.
   virtual void LostCapture(RenderWidgetHostImpl* render_widget_host) {}
 
   // Notification that the widget has lost the mouse lock.
   virtual void LostMouseLock(RenderWidgetHostImpl* render_widget_host) {}
 
 #if defined(OS_WIN)
   virtual gfx::NativeViewAccessible GetParentNativeViewAccessible();
 #endif
 
+  // Called when the widget has sent a compositor proto.

[no sievers, 2015/11/14 00:13:43]

nit: can you mention it's used in blimp mode?

[David Trainor- moved to gerrit, 2015/11/16 04:33:58]

Done.

+  virtual void HandleCompositorProto(RenderWidgetHostImpl* render_widget_host,
+                                     const std::vector<char>& proto) {}
+
  protected:
   virtual ~RenderWidgetHostDelegate() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_DELEGATE_H_