Support impl-side painting in Mandoline.

mojo/gles2/command_buffer_client_impl.h

 // 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.
 
 #ifndef MOJO_GLES2_COMMAND_BUFFER_CLIENT_IMPL_H_
 #define MOJO_GLES2_COMMAND_BUFFER_CLIENT_IMPL_H_
 
 #include <map>
 
+#include "base/atomic_sequence_num.h"
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "components/view_manager/public/interfaces/command_buffer.mojom.h"
 #include "gpu/command_buffer/client/gpu_control.h"
 #include "gpu/command_buffer/common/command_buffer.h"
 #include "gpu/command_buffer/common/command_buffer_shared.h"
 #include "mojo/public/cpp/bindings/error_handler.h"
 
 namespace base {
 class RunLoop;
@@ skipping 75 matching lines @@
   scoped_ptr<SyncClientImpl> sync_client_impl_;
   scoped_ptr<SyncPointClientImpl> sync_point_client_impl_;
 
   gpu::Capabilities capabilities_;
   State last_state_;
   mojo::ScopedSharedBufferHandle shared_state_handle_;
   gpu::CommandBufferSharedState* shared_state_;
   int32_t last_put_offset_;
   int32_t next_transfer_buffer_id_;
 
+  // Image IDs are allocated in sequence.
+  base::AtomicSequenceNumber next_image_id_;

[piman, 2015/06/15 18:14:33]

nit: shouldn't need to be atomic, this class should be used from a single thread
at a time.

[jam, 2015/06/15 22:06:02]

Done.

+
   const MojoAsyncWaiter* async_waiter_;
 };
 
 }  // gles2
 
 #endif  // MOJO_GLES2_COMMAND_BUFFER_CLIENT_IMPL_H_