Move flush id from WebGraphicsContext3DImpl to GLES2Implementation.

mojo/gpu/mojo_gles2_impl_autogen.cc

 // 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 1691 matching lines @@
   glCommitOverlayPlanesCHROMIUM();
 }
 void MojoGLES2Impl::SwapInterval(GLint interval) {
   MojoGLES2MakeCurrent(context_);
   glSwapInterval(interval);
 }
 void MojoGLES2Impl::FlushDriverCachesCHROMIUM() {
   MojoGLES2MakeCurrent(context_);
   glFlushDriverCachesCHROMIUM();
 }
+GLuint MojoGLES2Impl::GetLastFlushIdCHROMIUM() {
+  MojoGLES2MakeCurrent(context_);
+  return glGetLastFlushIdCHROMIUM();
+}
 void MojoGLES2Impl::MatrixLoadfCHROMIUM(GLenum matrixMode, const GLfloat* m) {
   MojoGLES2MakeCurrent(context_);
   glMatrixLoadfCHROMIUM(matrixMode, m);
 }
 void MojoGLES2Impl::MatrixLoadIdentityCHROMIUM(GLenum matrixMode) {
   MojoGLES2MakeCurrent(context_);
   glMatrixLoadIdentityCHROMIUM(matrixMode);
 }
 GLuint MojoGLES2Impl::GenPathsCHROMIUM(GLsizei range) {
   MojoGLES2MakeCurrent(context_);
@@ skipping 202 matching lines @@
 void MojoGLES2Impl::UniformMatrix4fvStreamTextureMatrixCHROMIUM(
     GLint location,
     GLboolean transpose,
     const GLfloat* default_value) {
   MojoGLES2MakeCurrent(context_);
   glUniformMatrix4fvStreamTextureMatrixCHROMIUM(location, transpose,
                                                 default_value);
 }
 
 }  // namespace mojo