GPU process clients can perform a "shallow" finish.

webkit/common/gpu/webgraphicscontext3d_in_process_command_buffer_impl.cc

 // 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.
 
 #include "webkit/common/gpu/webgraphicscontext3d_in_process_command_buffer_impl.h"
 
 #include <GLES2/gl2.h>
 #ifndef GL_GLEXT_PROTOTYPES
 #define GL_GLEXT_PROTOTYPES 1
 #endif
@@ skipping 1921 matching lines @@
 
 DELEGATE_TO_GL_2R(mapImageCHROMIUM, MapImageCHROMIUM,
                   WGC3Duint, WGC3Denum, void*);
 
 DELEGATE_TO_GL_1(unmapImageCHROMIUM, UnmapImageCHROMIUM, WGC3Duint);
 
 DELEGATE_TO_GL_3(bindUniformLocationCHROMIUM, BindUniformLocationCHROMIUM,
                  WebGLId, WGC3Dint, const WGC3Dchar*)
 
 DELEGATE_TO_GL(shallowFlushCHROMIUM, ShallowFlushCHROMIUM)
+DELEGATE_TO_GL(shallowFinishCHROMIUM, ShallowFinishCHROMIUM)
 
 DELEGATE_TO_GL_1(genMailboxCHROMIUM, GenMailboxCHROMIUM, WGC3Dbyte*)
 DELEGATE_TO_GL_2(produceTextureCHROMIUM, ProduceTextureCHROMIUM,
                  WGC3Denum, const WGC3Dbyte*)
 DELEGATE_TO_GL_2(consumeTextureCHROMIUM, ConsumeTextureCHROMIUM,
                  WGC3Denum, const WGC3Dbyte*)
 
 DELEGATE_TO_GL_2(drawBuffersEXT, DrawBuffersEXT,
                  WGC3Dsizei, const WGC3Denum*)
 
@@ skipping 27 matching lines @@
 DELEGATE_TO_GL_1(waitAsyncTexImage2DCHROMIUM, WaitAsyncTexImage2DCHROMIUM,
     WGC3Denum)
 
 void WebGraphicsContext3DInProcessCommandBufferImpl::SetGpuMemoryBufferCreator(
     GpuMemoryBufferCreator* creator) {
   g_gpu_memory_buffer_creator = creator;
 }
 
 }  // namespace gpu
 }  // namespace webkit