CommandBufferProxyImpl holds on to GpuMemoryBuffers while they are in use.

gpu/ipc/client/command_buffer_proxy_impl.cc

 // 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.
 
 #include "gpu/ipc/client/command_buffer_proxy_impl.h"
 
 #include <utility>
 #include <vector>
 
 #include "base/callback.h"
@@ skipping 500 matching lines @@
 }
 
 void CommandBufferProxyImpl::DestroyImage(int32_t id) {
   CheckLock();
   if (last_state_.error != gpu::error::kNoError)
     return;
 
   auto it = image_gmb_ids_map_.find(id);
   if (it != image_gmb_ids_map_.end())
     image_gmb_ids_map_.erase(it);
+  auto it2 = image_gmb_map_.find(id);
+  if (it2 != image_gmb_map_.end())
+    image_gmb_map_.erase(it2);
   Send(new GpuCommandBufferMsg_DestroyImage(route_id_, id));
 }
 
 int32_t CommandBufferProxyImpl::CreateGpuMemoryBufferImage(
     size_t width,
     size_t height,
     unsigned internal_format,
     unsigned usage) {
   CheckLock();
   std::unique_ptr<gfx::GpuMemoryBuffer> buffer(
       channel_->gpu_memory_buffer_manager()->AllocateGpuMemoryBuffer(
           gfx::Size(width, height),
           gpu::DefaultBufferFormatForImageFormat(internal_format),
           gfx::BufferUsage::SCANOUT, gpu::kNullSurfaceHandle));
   if (!buffer)
     return -1;
 
-  return CreateImage(buffer->AsClientBuffer(), width, height, internal_format);
+  int32_t result =
+      CreateImage(buffer->AsClientBuffer(), width, height, internal_format);
+  if (result != -1)
+    image_gmb_map_[result] = std::move(buffer);
+  return result;
 }
 
 int32_t CommandBufferProxyImpl::GetImageGpuMemoryBufferId(unsigned image_id) {
   CheckLock();
   auto it = image_gmb_ids_map_.find(image_id);
   if (it != image_gmb_ids_map_.end())
     return it->second;
   return -1;
 }
 
@@ skipping 317 matching lines @@
     return;
   channel_->FlushPendingStream(stream_id_);
   channel_->Send(new GpuChannelMsg_DestroyCommandBuffer(route_id_));
   channel_->RemoveRoute(route_id_);
   channel_ = nullptr;
   if (gpu_control_client_)
     gpu_control_client_->OnGpuControlLostContext();
 }
 
 }  // namespace gpu