Make context groups share a TextureBufferManager

gpu/command_buffer/service/command_buffer_service.h

Index: gpu/command_buffer/service/command_buffer_service.h
diff --git a/gpu/command_buffer/service/command_buffer_service.h b/gpu/command_buffer/service/command_buffer_service.h
index 77fe95163a81bf6f2870b78de61ff16ccadfd671..c3bb8413b76214e2802b856968de6a8efbe40514 100644
--- a/gpu/command_buffer/service/command_buffer_service.h
+++ b/gpu/command_buffer/service/command_buffer_service.h
@@ -6,8 +6,6 @@
 #define GPU_COMMAND_BUFFER_SERVICE_COMMAND_BUFFER_SERVICE_H_
 
 #include "base/callback.h"
-#include "base/memory/linked_ptr.h"
-#include "base/memory/scoped_ptr.h"
 #include "base/shared_memory.h"
 #include "gpu/command_buffer/common/command_buffer.h"
 #include "gpu/command_buffer/common/command_buffer_shared.h"
@@ -21,7 +19,8 @@ class TransferBufferManagerInterface;
 class GPU_EXPORT CommandBufferService : public CommandBuffer {
  public:
   typedef base::Callback<bool(int32)> GetBufferChangedCallback;
-  CommandBufferService();
+  explicit CommandBufferService(
+      TransferBufferManagerInterface* transfer_buffer_manager);
   virtual ~CommandBufferService();
 
   // CommandBuffer implementation:
@@ -72,11 +71,13 @@ class GPU_EXPORT CommandBufferService : public CommandBuffer {
   base::Closure put_offset_change_callback_;
   GetBufferChangedCallback get_buffer_change_callback_;
   base::Closure parse_error_callback_;
-  scoped_ptr<TransferBufferManagerInterface> transfer_buffer_manager_;
+  TransferBufferManagerInterface* transfer_buffer_manager_;
   int32 token_;
   uint32 generation_;
   error::Error error_;
   error::ContextLostReason context_lost_reason_;
+
+  DISALLOW_COPY_AND_ASSIGN(CommandBufferService);
 };
 
 }  // namespace gpu