Implementing FlushMappedBufferRange in GPU command buffer.

gpu/command_buffer/client/gles2_implementation_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 854 matching lines @@
 
 void UnmapBufferSubDataCHROMIUM(const void* mem) override;
 
 void* MapBufferRange(GLenum target,
                      GLintptr offset,
                      GLsizeiptr size,
                      GLbitfield access) override;
 
 GLboolean UnmapBuffer(GLenum target) override;
 
+void FlushMappedBufferRange(GLenum target,
+                            GLintptr offset,
+                            GLsizeiptr size) override;
+
 void* MapTexSubImage2DCHROMIUM(GLenum target,
                                GLint level,
                                GLint xoffset,
                                GLint yoffset,
                                GLsizei width,
                                GLsizei height,
                                GLenum format,
                                GLenum type,
                                GLenum access) override;
 
@@ skipping 305 matching lines @@
     GLint location,
     GLboolean transpose,
     const GLfloat* transform) override;
 
 void SwapBuffersWithDamageCHROMIUM(GLint x,
                                    GLint y,
                                    GLint width,
                                    GLint height) override;
 
 #endif  // GPU_COMMAND_BUFFER_CLIENT_GLES2_IMPLEMENTATION_AUTOGEN_H_