mustash: gpu: implement SignalQuery in CommandBufferLocal

components/mus/gles2/command_buffer_local.cc

Index: components/mus/gles2/command_buffer_local.cc
diff --git a/components/mus/gles2/command_buffer_local.cc b/components/mus/gles2/command_buffer_local.cc
index 834722ca5bc1b43181b5992ad96011df7181e4f9..e987ceae67451c4f50028072447fd109f31e4bb9 100644
--- a/components/mus/gles2/command_buffer_local.cc
+++ b/components/mus/gles2/command_buffer_local.cc
@@ -326,11 +326,13 @@ void CommandBufferLocal::SignalSyncPoint(uint32_t 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) {
@@ -551,6 +553,12 @@ bool CommandBufferLocal::DeleteOnGpuThread() {
   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();