Fix bug in virtualized GL context state management upon creation.

gpu/ipc/service/gpu_command_buffer_stub.h

 // 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.
 
 #ifndef GPU_IPC_SERVICE_GPU_COMMAND_BUFFER_STUB_H_
 #define GPU_IPC_SERVICE_GPU_COMMAND_BUFFER_STUB_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 52 matching lines @@
     // Called in Destroy(), before the context/surface are released.
     virtual void OnWillDestroyStub() = 0;
 
    protected:
     virtual ~DestructionObserver() {}
   };
 
   typedef base::Callback<void(const std::vector<ui::LatencyInfo>&)>
       LatencyInfoCallback;
 
+  // This must leave the GL context associated with the newly-created
+  // GpuCommandBufferStub current, so the GpuChannel can initialize
+  // the gpu::Capabilities.
   static std::unique_ptr<GpuCommandBufferStub> Create(
       GpuChannel* channel,
       GpuCommandBufferStub* share_group,
       const GPUCreateCommandBufferConfig& init_params,
       CommandBufferId command_buffer_id,
       SequenceId sequence_id,
       int32_t stream_id,
       int32_t route_id,
       std::unique_ptr<base::SharedMemory> shared_state_shm);
 
@@ skipping 168 matching lines @@
 
   std::unique_ptr<WaitForCommandState> wait_for_token_;
   std::unique_ptr<WaitForCommandState> wait_for_get_offset_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuCommandBufferStub);
 };
 
 }  // namespace gpu
 
 #endif  // GPU_IPC_SERVICE_GPU_COMMAND_BUFFER_STUB_H_