Don't include the tracing in gpu_memory_buffer.h

ui/gfx/gpu_memory_buffer_tracing.cc

-// Copyright 2013 The Chromium Authors. All rights reserved.
+// Copyright 2016 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.
 
-#include "ui/gfx/gpu_memory_buffer.h"
+#include "ui/gfx/gpu_memory_buffer_tracing.h"
 
 namespace gfx {
 
 base::trace_event::MemoryAllocatorDumpGuid GetGpuMemoryBufferGUIDForTracing(
     uint64_t tracing_process_id,
     GpuMemoryBufferId buffer_id) {
   // TODO(ericrk): Currently this function just wraps
   // GetGenericSharedMemoryGUIDForTracing, we may want to special case this if
   // the GPU memory buffer is not backed by shared memory.
   return gfx::GetGenericSharedMemoryGUIDForTracing(tracing_process_id,
                                                    buffer_id);
 }
 
-GpuMemoryBufferHandle::GpuMemoryBufferHandle()
-    : type(EMPTY_BUFFER), id(0), handle(base::SharedMemory::NULLHandle()) {
-}
-
-GpuMemoryBufferHandle::GpuMemoryBufferHandle(
-    const GpuMemoryBufferHandle& other) = default;
-
-GpuMemoryBufferHandle::~GpuMemoryBufferHandle() {}
-
-void GpuMemoryBuffer::SetColorSpaceForScanout(
-    const gfx::ColorSpace& color_space) {}
-
 }  // namespace gfx