Added a unique command buffer ID for command buffers.

content/common/gpu/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 "content/common/gpu/client/command_buffer_proxy_impl.h"
 
 #include <vector>
 
 #include "base/callback.h"
 #include "base/logging.h"
 #include "base/memory/shared_memory.h"
 #include "base/stl_util.h"
 #include "base/trace_event/trace_event.h"
 #include "content/common/child_process_messages.h"
 #include "content/common/gpu/client/gpu_channel_host.h"
 #include "content/common/gpu/client/gpu_video_decode_accelerator_host.h"
 #include "content/common/gpu/client/gpu_video_encode_accelerator_host.h"
 #include "content/common/gpu/gpu_messages.h"
 #include "content/common/view_messages.h"
 #include "gpu/command_buffer/client/gpu_memory_buffer_manager.h"
 #include "gpu/command_buffer/common/cmd_buffer_common.h"
 #include "gpu/command_buffer/common/command_buffer_shared.h"
 #include "gpu/command_buffer/common/gpu_memory_allocation.h"
 #include "gpu/command_buffer/service/image_factory.h"
 #include "ui/gfx/geometry/size.h"
 #include "ui/gl/gl_bindings.h"
 
 namespace content {
 
+uint64_t CommandBufferProxyID(int channel_id, int32 route_id) {

[dcheng, 2015/09/17 17:08:18]

Nit: wrap this in namespace { }?

[David Yen, 2015/09/17 17:26:21]

Done.

+  return (static_cast<uint64_t>(channel_id) << 32) | route_id;
+}
+
 CommandBufferProxyImpl::CommandBufferProxyImpl(GpuChannelHost* channel,
                                                int32 route_id,
                                                int32 stream_id)
     : lock_(nullptr),
       channel_(channel),
+      command_buffer_id_(CommandBufferProxyID(channel->channel_id(), route_id)),
       route_id_(route_id),
       stream_id_(stream_id),
       flush_count_(0),
       last_put_offset_(-1),
       last_barrier_put_offset_(-1),
       next_signal_id_(0) {
   DCHECK(channel);
 }
 
 CommandBufferProxyImpl::~CommandBufferProxyImpl() {
@@ skipping 423 matching lines @@
 }
 
 void CommandBufferProxyImpl::SetLock(base::Lock* lock) {
   lock_ = lock;
 }
 
 bool CommandBufferProxyImpl::IsGpuChannelLost() {
   return !channel_ || channel_->IsLost();
 }
 
+gpu::CommandBufferNamespace CommandBufferProxyImpl::GetNamespaceID() const {
+  return gpu::kCommandBufferNamespace_GpuIO;
+}
+
+uint64_t CommandBufferProxyImpl::GetCommandBufferID() const {
+  return command_buffer_id_;
+}
+
 uint32 CommandBufferProxyImpl::InsertSyncPoint() {
   CheckLock();
   if (last_state_.error != gpu::error::kNoError)
     return 0;
 
   uint32 sync_point = 0;
   Send(new GpuCommandBufferMsg_InsertSyncPoint(route_id_, true, &sync_point));
   return sync_point;
 }
 
@@ skipping 152 matching lines @@
   }
 }
 
 void CommandBufferProxyImpl::OnUpdateVSyncParameters(base::TimeTicks timebase,
                                                      base::TimeDelta interval) {
   if (!update_vsync_parameters_completion_callback_.is_null())
     update_vsync_parameters_completion_callback_.Run(timebase, interval);
 }
 
 }  // namespace content