Add glClientWaitSync to GPU command buffer.

gpu/command_buffer/client/gles2_c_lib_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 101 matching lines @@
                      GLclampf blue,
                      GLclampf alpha) {
   gles2::GetGLContext()->ClearColor(red, green, blue, alpha);
 }
 void GLES2ClearDepthf(GLclampf depth) {
   gles2::GetGLContext()->ClearDepthf(depth);
 }
 void GLES2ClearStencil(GLint s) {
   gles2::GetGLContext()->ClearStencil(s);
 }
+GLenum GLES2ClientWaitSync(GLsync sync, GLbitfield flags, GLuint64 timeout) {
+  return gles2::GetGLContext()->ClientWaitSync(sync, flags, timeout);
+}
 void GLES2ColorMask(GLboolean red,
                     GLboolean green,
                     GLboolean blue,
                     GLboolean alpha) {
   gles2::GetGLContext()->ColorMask(red, green, blue, alpha);
 }
 void GLES2CompileShader(GLuint shader) {
   gles2::GetGLContext()->CompileShader(shader);
 }
 void GLES2CompressedTexImage2D(GLenum target,
@@ skipping 1282 matching lines @@
     },
     {
      "glClearDepthf",
      reinterpret_cast<GLES2FunctionPointer>(glClearDepthf),
     },
     {
      "glClearStencil",
      reinterpret_cast<GLES2FunctionPointer>(glClearStencil),
     },
     {
+     "glClientWaitSync",
+     reinterpret_cast<GLES2FunctionPointer>(glClientWaitSync),
+    },
+    {
      "glColorMask",
      reinterpret_cast<GLES2FunctionPointer>(glColorMask),
     },
     {
      "glCompileShader",
      reinterpret_cast<GLES2FunctionPointer>(glCompileShader),
     },
     {
      "glCompressedTexImage2D",
      reinterpret_cast<GLES2FunctionPointer>(glCompressedTexImage2D),
@@ skipping 1042 matching lines @@
      reinterpret_cast<GLES2FunctionPointer>(glBlendBarrierKHR),
     },
     {
      NULL,
      NULL,
     },
 };
 
 }  // namespace gles2
 #endif  // GPU_COMMAND_BUFFER_CLIENT_GLES2_C_LIB_AUTOGEN_H_