gpu: Remove Echo and SwapCompletion GL interfacess

gpu/command_buffer/service/in_process_command_buffer.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 GPU_COMMAND_BUFFER_SERVICE_IN_PROCESS_COMMAND_BUFFER_H_
 #define GPU_COMMAND_BUFFER_SERVICE_IN_PROCESS_COMMAND_BUFFER_H_
 
 #include <map>
 #include <vector>
 
@@ skipping 90 matching lines @@
                                                       int32* id) OVERRIDE;
   virtual void DestroyGpuMemoryBuffer(int32 id) OVERRIDE;
   virtual uint32 InsertSyncPoint() OVERRIDE;
   virtual uint32 InsertFutureSyncPoint() OVERRIDE;
   virtual void RetireSyncPoint(uint32 sync_point) OVERRIDE;
   virtual void SignalSyncPoint(uint32 sync_point,
                                const base::Closure& callback) OVERRIDE;
   virtual void SignalQuery(uint32 query_id,
                            const base::Closure& callback) OVERRIDE;
   virtual void SetSurfaceVisible(bool visible) OVERRIDE;
-  virtual void Echo(const base::Closure& callback) OVERRIDE;
   virtual uint32 CreateStreamTexture(uint32 texture_id) OVERRIDE;
 
   // The serializer interface to the GPU service (i.e. thread).
   class Service {
    public:
     Service();
     virtual ~Service();
 
     virtual void AddRef() const = 0;
     virtual void Release() const = 0;
@@ skipping 105 matching lines @@
 
   base::WeakPtr<InProcessCommandBuffer> gpu_thread_weak_ptr_;
   base::WeakPtrFactory<InProcessCommandBuffer> gpu_thread_weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(InProcessCommandBuffer);
 };
 
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_IN_PROCESS_COMMAND_BUFFER_H_