gpu: Associate all GpuMemoryBuffers with unique IDs.

content/common/gpu/client/gpu_memory_buffer_impl.cc

 // 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.
 
 #include "content/common/gpu/client/gpu_memory_buffer_impl.h"
 
 #include "ui/gl/gl_bindings.h"
 
 namespace content {
 
-GpuMemoryBufferImpl::GpuMemoryBufferImpl(const gfx::Size& size,
+GpuMemoryBufferImpl::GpuMemoryBufferImpl(gfx::GpuMemoryBufferId id,
+                                         const gfx::Size& size,
                                          Format format,
                                          const DestructionCallback& callback)
-    : size_(size),
+    : id_(id),
+      size_(size),
       format_(format),
       callback_(callback),
       mapped_(false),
       destruction_sync_point_(0) {
 }
 
 GpuMemoryBufferImpl::~GpuMemoryBufferImpl() {
   callback_.Run(destruction_sync_point_);
 }
 
@@ skipping 22 matching lines @@
 
 bool GpuMemoryBufferImpl::IsMapped() const {
   return mapped_;
 }
 
 ClientBuffer GpuMemoryBufferImpl::AsClientBuffer() {
   return reinterpret_cast<ClientBuffer>(this);
 }
 
 }  // namespace content