Added Pepper 3D render context that instantiates the GPU plugin....

gpu/command_buffer/common/command_buffer.h

 // Copyright (c) 2009 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_COMMAND_BUFFER_COMMON_COMMAND_BUFFER_H_
 #define GPU_COMMAND_BUFFER_COMMON_COMMAND_BUFFER_H_
 
-#include "base/shared_memory.h"
 #include "base/task.h"
+#include "gpu/command_buffer/common/buffer.h"
 
 namespace gpu {
 
 // Common interface for CommandBuffer implementations.
 class CommandBuffer {
  public:
   CommandBuffer() {
   }
 
   virtual ~CommandBuffer() {
   }
 
   // Initialize the command buffer with the given size (number of command
   // entries).
-  virtual base::SharedMemory* Initialize(int32 size) = 0;
+  virtual bool Initialize(int32 size) = 0;
 
-  // Gets the shared memory ring buffer object for the command buffer.
-  virtual base::SharedMemory* GetRingBuffer() = 0;
+  // Gets the ring buffer for the command buffer.
+  virtual Buffer GetRingBuffer() = 0;
 
   virtual int32 GetSize() = 0;
 
   // The writer calls this to update its put offset. This function returns the
   // reader's most recent get offset. Does not return until after the put offset
   // change callback has been invoked. Returns -1 if the put offset is invalid.
   virtual int32 SyncOffsets(int32 put_offset) = 0;
 
   // Returns the current get offset. This can be called from any thread.
   virtual int32 GetGetOffset() = 0;
 
   // Sets the current get offset. This can be called from any thread.
   virtual void SetGetOffset(int32 get_offset) = 0;
 
   // Returns the current put offset. This can be called from any thread.
   virtual int32 GetPutOffset() = 0;
 
   // Sets a callback that should be posted on another thread whenever the put
   // offset is changed. The callback must not return until some progress has
   // been made (unless the command buffer is empty), i.e. the
   // get offset must have changed. It need not process the entire command
   // buffer though. This allows concurrency between the writer and the reader
   // while giving the writer a means of waiting for the reader to make some
   // progress before attempting to write more to the command buffer. Avoiding
   // the use of a synchronization primitive like a condition variable to
   // synchronize reader and writer reduces the risk of deadlock.
   // Takes ownership of callback. The callback is invoked on the plugin thread.
   virtual void SetPutOffsetChangeCallback(Callback0::Type* callback) = 0;
 
-  // Create a shared memory transfer buffer and return a handle that uniquely
+  // Create a transfer buffer and return a handle that uniquely
   // identifies it or -1 on error.
   virtual int32 CreateTransferBuffer(size_t size) = 0;
 
-  // Destroy a shared memory transfer buffer and recycle the handle.
+  // Destroy a transfer buffer and recycle the handle.
   virtual void DestroyTransferBuffer(int32 id) = 0;
 
-  // Get the shared memory associated with a handle.
-  virtual base::SharedMemory* GetTransferBuffer(int32 handle) = 0;
+  // Get the transfer buffer associated with a handle.
+  virtual Buffer GetTransferBuffer(int32 handle) = 0;
 
   // Get the current token value. This is used for by the writer to defer
   // changes to shared memory objects until the reader has reached a certain
   // point in the command buffer. The reader is responsible for updating the
   // token value, for example in response to an asynchronous set token command
   // embedded in the command buffer. The default token value is zero.
   virtual int32 GetToken() = 0;
 
   // Allows the reader to update the current token value.
   virtual void SetToken(int32 token) = 0;
@@ skipping 12 matching lines @@
   // command buffer cannot recover and ceases to process commands.
   virtual void RaiseErrorStatus() = 0;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(CommandBuffer);
 };
 
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_COMMON_COMMAND_BUFFER_H_