Expose GpuMemoryBufferId through glGetImageivCHROMIUM.

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 291 matching lines @@
   DCHECK_EQ(usage, static_cast<unsigned>(GL_READ_WRITE_CHROMIUM));
   std::unique_ptr<gfx::GpuMemoryBuffer> buffer(MojoGpuMemoryBufferImpl::Create(
       gfx::Size(static_cast<int>(width), static_cast<int>(height)),
       gpu::DefaultBufferFormatForImageFormat(internal_format),
       gfx::BufferUsage::SCANOUT));
   if (!buffer)
     return -1;
   return CreateImage(buffer->AsClientBuffer(), width, height, internal_format);
 }
 
+int32_t CommandBufferLocal::GetImageGpuMemoryBufferId(unsigned image_id) {
+  NOTIMPLEMENTED();

[piman, 2016/05/26 21:16:07]

Can you add a TODO?

[erikchen, 2016/05/26 21:41:27]

Done.

+  return -1;
+}
+
 void CommandBufferLocal::SignalQuery(uint32_t query_id,
                                      const base::Closure& callback) {
   DCHECK(CalledOnValidThread());
 
   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) {
@@ skipping 245 matching lines @@
     client_->UpdateVSyncParameters(timebase, interval);
 }
 
 void CommandBufferLocal::OnGpuCompletedSwapBuffersOnClientThread(
     gfx::SwapResult result) {
   if (client_)
     client_->GpuCompletedSwapBuffers(result);
 }
 
 }  // namespace mus