GPU process clients can perform a "shallow" finish.

content/common/gpu/client/webgraphicscontext3d_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 "content/common/gpu/client/webgraphicscontext3d_command_buffer_impl.h"
 
 #include "third_party/khronos/GLES2/gl2.h"
 #ifndef GL_GLEXT_PROTOTYPES
 #define GL_GLEXT_PROTOTYPES 1
 #endif
@@ skipping 1507 matching lines @@
 DELEGATE_TO_GL_3(getQueryivEXT, GetQueryivEXT, WGC3Denum, WGC3Denum, WGC3Dint*)
 DELEGATE_TO_GL_3(getQueryObjectuivEXT, GetQueryObjectuivEXT,
                  WebGLId, WGC3Denum, WGC3Duint*)
 
 DELEGATE_TO_GL_6(copyTextureCHROMIUM, CopyTextureCHROMIUM,  WGC3Denum,
                  WebGLId, WebGLId, WGC3Dint, WGC3Denum, WGC3Denum);
 
 DELEGATE_TO_GL_3(bindUniformLocationCHROMIUM, BindUniformLocationCHROMIUM,
                  WebGLId, WGC3Dint, const WGC3Dchar*)
 
-DELEGATE_TO_GL(shallowFlushCHROMIUM,ShallowFlushCHROMIUM);
+DELEGATE_TO_GL(shallowFlushCHROMIUM, ShallowFlushCHROMIUM);
+DELEGATE_TO_GL(shallowFinishCHROMIUM, ShallowFinishCHROMIUM);
 
 DELEGATE_TO_GL_1(waitSyncPoint, WaitSyncPointCHROMIUM, GLuint)
 
 static void SignalSyncPointCallback(
     scoped_ptr<
       WebKit::WebGraphicsContext3D::WebGraphicsSyncPointCallback> callback) {
   callback->onSyncPointReached();
 }
 
 void WebGraphicsContext3DCommandBufferImpl::signalSyncPoint(
@@ skipping 121 matching lines @@
 
 void WebGraphicsContext3DCommandBufferImpl::OnErrorMessage(
     const std::string& message, int id) {
   if (error_message_callback_) {
     WebKit::WebString str = WebKit::WebString::fromUTF8(message.c_str());
     error_message_callback_->onErrorMessage(str, id);
   }
 }
 
 }  // namespace content