Revert of Changed Blimp client to start with white screen before drawing contents

blimp/client/feature/compositor/blimp_compositor.h

 // Copyright 2015 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 BLIMP_CLIENT_FEATURE_COMPOSITOR_BLIMP_COMPOSITOR_H_
 #define BLIMP_CLIENT_FEATURE_COMPOSITOR_BLIMP_COMPOSITOR_H_
 
 #include <memory>
 #include <vector>
 
@@ skipping 34 matching lines @@
 class BlimpCompositorClient {
  public:
   // These methods should provide the dependencies for cc::LayerTreeHost for
   // this compositor.
   virtual cc::LayerTreeSettings* GetLayerTreeSettings() = 0;
   virtual scoped_refptr<base::SingleThreadTaskRunner>
   GetCompositorTaskRunner() = 0;
   virtual cc::TaskGraphRunner* GetTaskGraphRunner() = 0;
   virtual gpu::GpuMemoryBufferManager* GetGpuMemoryBufferManager() = 0;
   virtual cc::ImageSerializationProcessor* GetImageSerializationProcessor() = 0;
-  virtual void DidCompleteSwapBuffers() = 0;
 
   // Should send web gesture events which could not be handled locally by the
   // compositor to the engine.
   virtual void SendWebGestureEvent(
       int render_widget_id,
       const blink::WebGestureEvent& gesture_event) = 0;
 
   // Should send the compositor messages from the remote client LayerTreeHost of
   // this compositor to the corresponding remote server LayerTreeHost.
   virtual void SendCompositorMessage(
@@ skipping 141 matching lines @@
   // widget.
   std::unique_ptr<BlimpInputManager> input_manager_;
 
   DISALLOW_COPY_AND_ASSIGN(BlimpCompositor);
 };
 
 }  // namespace client
 }  // namespace blimp
 
 #endif  // BLIMP_CLIENT_FEATURE_COMPOSITOR_BLIMP_COMPOSITOR_H_