Add glClientWaitSync to GPU command buffer.

gpu/command_buffer/client/gles2_interface_stub_impl_autogen.h

 // Copyright 2014 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.
 
 // This file is auto-generated from
 // gpu/command_buffer/build_gles2_cmd_buffer.py
 // It's formatted by clang-format using chromium coding style:
 //    clang-format -i -style=chromium filename
 // DO NOT EDIT!
 
@@ skipping 87 matching lines @@
 }
 void GLES2InterfaceStub::ClearColor(GLclampf /* red */,
                                     GLclampf /* green */,
                                     GLclampf /* blue */,
                                     GLclampf /* alpha */) {
 }
 void GLES2InterfaceStub::ClearDepthf(GLclampf /* depth */) {
 }
 void GLES2InterfaceStub::ClearStencil(GLint /* s */) {
 }
+GLenum GLES2InterfaceStub::ClientWaitSync(GLsync /* sync */,
+                                          GLbitfield /* flags */,
+                                          GLuint64 /* timeout */) {
+  return 0;
+}
 void GLES2InterfaceStub::ColorMask(GLboolean /* red */,
                                    GLboolean /* green */,
                                    GLboolean /* blue */,
                                    GLboolean /* alpha */) {
 }
 void GLES2InterfaceStub::CompileShader(GLuint /* shader */) {
 }
 void GLES2InterfaceStub::CompressedTexImage2D(GLenum /* target */,
                                               GLint /* level */,
                                               GLenum /* internalformat */,
@@ skipping 1067 matching lines @@
 void GLES2InterfaceStub::SwapInterval(GLint /* interval */) {
 }
 void GLES2InterfaceStub::MatrixLoadfCHROMIUM(GLenum /* matrixMode */,
                                              const GLfloat* /* m */) {
 }
 void GLES2InterfaceStub::MatrixLoadIdentityCHROMIUM(GLenum /* matrixMode */) {
 }
 void GLES2InterfaceStub::BlendBarrierKHR() {
 }
 #endif  // GPU_COMMAND_BUFFER_CLIENT_GLES2_INTERFACE_STUB_IMPL_AUTOGEN_H_