Plumb cc::LatencyInfo through command buffer and output surface

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 "base/callback.h"
 #include "base/debug/trace_event.h"
 #include "base/logging.h"
 #include "base/process_util.h"
@@ skipping 184 matching lines @@
   if (last_put_offset_ == put_offset)
     return;
 
   last_put_offset_ = put_offset;
 
   Send(new GpuCommandBufferMsg_AsyncFlush(route_id_,
                                           put_offset,
                                           ++flush_count_));
 }
 
+void CommandBufferProxyImpl::SetLatencyInfo(
+    const cc::LatencyInfo& latency_info) {

[piman, 2013/04/03 18:05:09]

You need to check for last_state_.error != gpu::error::kNoError here (common
pattern in every entry-point that sends a message, see also DCHECK in ::Send).

+  Send(new GpuCommandBufferMsg_SetLatencyInfo(route_id_, latency_info));
+}
+
 gpu::CommandBuffer::State CommandBufferProxyImpl::FlushSync(
     int32 put_offset,
     int32 last_known_get) {
   TRACE_EVENT1("gpu", "CommandBufferProxyImpl::FlushSync", "put_offset",
                put_offset);
   Flush(put_offset);
   TryUpdateState();
   if (last_known_get == last_state_.get_offset) {
     // Send will flag state with lost context if IPC fails.
     if (last_state_.error == gpu::error::kNoError) {
@@ skipping 310 matching lines @@
 void CommandBufferProxyImpl::SendManagedMemoryStats(
     const GpuManagedMemoryStats& stats) {
   if (last_state_.error != gpu::error::kNoError)
     return;
 
   Send(new GpuCommandBufferMsg_SendClientManagedMemoryStats(route_id_,
                                                             stats));
 }
 
 }  // namespace content