Expose GpuMemoryBufferId through glGetImageivCHROMIUM.

components/mus/public/cpp/lib/command_buffer_client_impl.cc

 // Copyright 2014 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/public/cpp/lib/command_buffer_client_impl.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <limits>
@@ skipping 253 matching lines @@
       mus::MojoGpuMemoryBufferImpl::Create(
           gfx::Size(static_cast<int>(width), static_cast<int>(height)),
           gpu::DefaultBufferFormatForImageFormat(internalformat),
           gfx::BufferUsage::SCANOUT));
   if (!buffer)
     return -1;
 
   return CreateImage(buffer->AsClientBuffer(), width, height, internalformat);
 }
 
+int32_t CommandBufferClientImpl::GetImageGpuMemoryBufferId(unsigned image_id) {
+  // TODO(erikchen): Once this class supports IOSurface GpuMemoryBuffer backed
+  // images, it will also need to keep a local cache from image id to
+  // GpuMemoryBuffer id.
+  NOTIMPLEMENTED();
+  return -1;
+}
+
 void CommandBufferClientImpl::SignalQuery(uint32_t query,
                                           const base::Closure& callback) {
   // TODO(piman)
   NOTIMPLEMENTED();
 }
 
 void CommandBufferClientImpl::Destroyed(int32_t lost_reason, int32_t error) {
   if (destroyed_)
     return;
   last_state_.context_lost_reason =
@@ skipping 85 matching lines @@
 
   // It is also safe to wait on the same context.
   if (sync_token->namespace_id() == gpu::CommandBufferNamespace::MOJO &&
       sync_token->command_buffer_id() == GetCommandBufferID())
     return true;
 
   return false;
 }
 
 }  // namespace mus