mustash: gpu: implement SignalQuery in CommandBufferLocal

components/mus/gles2/command_buffer_local.cc

 // Copyright 2015 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 "components/mus/gles2/command_buffer_local.h"
 
 #include "base/atomic_sequence_num.h"
 #include "base/bind.h"
 #include "base/memory/shared_memory.h"
 #include "base/synchronization/waitable_event.h"
@@ skipping 308 matching lines @@
                                 base::Unretained(this), sync_point));
 }
 
 void CommandBufferLocal::SignalSyncPoint(uint32_t sync_point,
                                          const base::Closure& callback) {
   DCHECK(CalledOnValidThread());
   gpu_state_->sync_point_manager()->AddSyncPointCallback(sync_point,
       base::Bind(&PostTask, client_thread_task_runner_, callback));
 }
 
-void CommandBufferLocal::SignalQuery(uint32_t query,
+void CommandBufferLocal::SignalQuery(uint32_t query_id,
                                      const base::Closure& callback) {
   DCHECK(CalledOnValidThread());
-  // TODO(piman)
-  NOTIMPLEMENTED();
+
+  gpu_state_->command_buffer_task_runner()->PostTask(
+      driver_.get(), base::Bind(&CommandBufferLocal::SignalQueryOnGpuThread,
+                                base::Unretained(this), query_id, callback));
 }
 
 void CommandBufferLocal::SetLock(base::Lock* lock) {
   DCHECK(CalledOnValidThread());
   NOTIMPLEMENTED();
 }
 
 bool CommandBufferLocal::IsGpuChannelLost() {
   DCHECK(CalledOnValidThread());
   // This is only possible for out-of-process command buffers.
@@ skipping 200 matching lines @@
   *state = driver_->GetLastState();
   event->Signal();
   return true;
 }
 
 bool CommandBufferLocal::DeleteOnGpuThread() {
   delete this;
   return true;
 }
 
+bool CommandBufferLocal::SignalQueryOnGpuThread(uint32_t query_id,
+                                                const base::Closure& callback) {
+  driver_->SignalQuery(query_id, callback);

[Peng, 2016/01/20 22:27:29]

You must make sure the callback is called on the client thread.

[Hadi, 2016/01/21 15:46:27]

Done.

+  return true;
+}
+
 void CommandBufferLocal::DidLoseContextOnClientThread(uint32_t reason) {
   if (client_)
     client_->DidLoseContext();
 }
 
 void CommandBufferLocal::UpdateVSyncParametersOnClientThread(int64_t timebase,
                                                              int64_t interval) {
   if (client_)
     client_->UpdateVSyncParameters(timebase, interval);
 }
 
 }  // namespace mus