GPU process clients can perform a "shallow" finish.

content/common/gpu/client/webgraphicscontext3d_command_buffer_impl.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 CONTENT_COMMON_GPU_CLIENT_WEBGRAPHICSCONTEXT3D_COMMAND_BUFFER_IMPL_H_
 #define CONTENT_COMMON_GPU_CLIENT_WEBGRAPHICSCONTEXT3D_COMMAND_BUFFER_IMPL_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 540 matching lines @@
 
   virtual void copyTextureCHROMIUM(WGC3Denum target, WebGLId source_id,
                                    WebGLId dest_id, WGC3Dint level,
                                    WGC3Denum internal_format,
                                    WGC3Denum dest_type);
 
   virtual void bindUniformLocationCHROMIUM(WebGLId program, WGC3Dint location,
                                            const WGC3Dchar* uniform);
 
   virtual void shallowFlushCHROMIUM();
+  virtual void shallowFinishCHROMIUM();
 
   virtual void genMailboxCHROMIUM(WGC3Dbyte* mailbox);
   virtual void produceTextureCHROMIUM(WGC3Denum target,
                                       const WGC3Dbyte* mailbox);
   virtual void consumeTextureCHROMIUM(WGC3Denum target,
                                       const WGC3Dbyte* mailbox);
 
   virtual void insertEventMarkerEXT(const WGC3Dchar* marker);
   virtual void pushGroupMarkerEXT(const WGC3Dchar* marker);
   virtual void popGroupMarkerEXT();
@@ skipping 180 matching lines @@
   bool use_echo_for_swap_ack_;
   size_t command_buffer_size_;
   size_t start_transfer_buffer_size_;
   size_t min_transfer_buffer_size_;
   size_t max_transfer_buffer_size_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_GPU_CLIENT_WEBGRAPHICSCONTEXT3D_COMMAND_BUFFER_IMPL_H_