Expose GpuMemoryBufferId through glGetImageivCHROMIUM.

ppapi/proxy/ppapi_command_buffer_proxy.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 "ppapi/proxy/ppapi_command_buffer_proxy.h"
 
 #include <utility>
 
 #include "base/numerics/safe_conversions.h"
 #include "ppapi/proxy/ppapi_messages.h"
@@ skipping 244 matching lines @@
 
 int32_t PpapiCommandBufferProxy::CreateGpuMemoryBufferImage(
     size_t width,
     size_t height,
     unsigned internalformat,
     unsigned usage) {
   NOTREACHED();
   return -1;
 }
 
+int32_t PpapiCommandBufferProxy::GetImageGpuMemoryBufferId(unsigned image_id) {
+  NOTREACHED();
+  return -1;
+}
+
 bool PpapiCommandBufferProxy::Send(IPC::Message* msg) {
   DCHECK(last_state_.error == gpu::error::kNoError);
 
   // We need to hold the Pepper proxy lock for sync IPC, because the GPU command
   // buffer may use a sync IPC with another lock held which could lead to lock
   // and deadlock if we dropped the proxy lock here.
   // http://crbug.com/418651
   if (dispatcher_->SendAndStayLocked(msg))
     return true;
 
@@ skipping 42 matching lines @@
   message->set_unblock(true);
   Send(message);
 
   flush_info_->flush_pending = false;
   flush_info_->resource.SetHostResource(0, 0);
   flushed_fence_sync_release_ = pending_fence_sync_release_;
 }
 
 }  // namespace proxy
 }  // namespace ppapi