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 892 matching lines @@
                                                          WGC3Dintptr offset) {
   gl_->DrawElements(
       mode, count, type,
       reinterpret_cast<void*>(static_cast<intptr_t>(offset)));
 }
 
 DELEGATE_TO_GL_1(enable, Enable, WGC3Denum)
 
 DELEGATE_TO_GL_1(enableVertexAttribArray, EnableVertexAttribArray,
                  WGC3Duint)
-
-void WebGraphicsContext3DCommandBufferImpl::finish() {
-  gl_->Finish();
-  if (!visible_ && free_command_buffer_when_invisible_)
-    real_gl_->FreeEverything();
-}
+//
+//void WebGraphicsContext3DCommandBufferImpl::finish() {
+//  gl_->Finish();
+//  if (!visible_ && free_command_buffer_when_invisible_)
+//    real_gl_->FreeEverything();
+//}
 
 void WebGraphicsContext3DCommandBufferImpl::flush() {
   gl_->Flush();
   if (!visible_ && free_command_buffer_when_invisible_)
     real_gl_->FreeEverything();
 }
 
 DELEGATE_TO_GL_4(framebufferRenderbuffer, FramebufferRenderbuffer,
                  WGC3Denum, WGC3Denum, WGC3Denum, WebGLId)
 
@@ skipping 731 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