Implementing FlushMappedBufferRange in GPU command buffer.

gpu/command_buffer/service/gles2_cmd_decoder_passthrough_doers.cc

 // Copyright (c) 2016 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 "gpu/command_buffer/service/gles2_cmd_decoder_passthrough.h"
 
 #include "base/strings/string_number_conversions.h"
 
 namespace gpu {
 namespace gles2 {
@@ skipping 693 matching lines @@
 error::Error GLES2DecoderPassthroughImpl::DoFinish() {
   glFinish();
   return error::kNoError;
 }
 
 error::Error GLES2DecoderPassthroughImpl::DoFlush() {
   glFlush();
   return error::kNoError;
 }
 
+error::Error GLES2DecoderPassthroughImpl::DoFlushMappedBufferRange(
+    GLenum target,
+    GLintptr offset,
+    GLsizeiptr size) {
+  return error::kNoError;
+}
+
 error::Error GLES2DecoderPassthroughImpl::DoFramebufferRenderbuffer(
     GLenum target,
     GLenum attachment,
     GLenum renderbuffertarget,
     GLuint renderbuffer) {
   // TODO(geofflang): Handle this case in ANGLE by adding a WebGL validation
   // mode.
   if (attachment == GL_DEPTH_STENCIL_ATTACHMENT) {
     glFramebufferRenderbufferEXT(
         target, GL_DEPTH_ATTACHMENT, renderbuffertarget,
@@ skipping 2334 matching lines @@
 GLES2DecoderPassthroughImpl::DoUniformMatrix4fvStreamTextureMatrixCHROMIUM(
     GLint location,
     GLboolean transpose,
     const volatile GLfloat* defaultValue) {
   NOTIMPLEMENTED();
   return error::kNoError;
 }
 
 }  // namespace gles2
 }  // namespace gpu