Moved creation of GPU transfer buffers into the browser process....

gpu/command_buffer/common/command_buffer.h

Index: gpu/command_buffer/common/command_buffer.h
===================================================================
--- gpu/command_buffer/common/command_buffer.h	(revision 75655)
+++ gpu/command_buffer/common/command_buffer.h	(working copy)
@@ -80,6 +80,12 @@
   // identifies it or -1 on error.
   virtual int32 CreateTransferBuffer(size_t size) = 0;
 
+  // Register an existing shared memory object and get an ID that can be used
+  // to identify it in the command buffer. Callee dups the handle until
+  // DestroyTransferBuffer is called.
+  virtual int32 RegisterTransferBuffer(base::SharedMemory* shared_memory,
+                                       size_t size) = 0;
+
   // Destroy a transfer buffer and recycle the handle.
   virtual void DestroyTransferBuffer(int32 id) = 0;