Attach YUV420 to RGB converter to GLContext

ui/gl/gl_context.cc

 // Copyright (c) 2012 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 <string>
 
 #include "base/bind.h"
 #include "base/cancelable_callback.h"
 #include "base/command_line.h"
 #include "base/lazy_instance.h"
@@ skipping 72 matching lines @@
   return std::string(version ? version : "");
 }
 
 std::string GLContext::GetGLRenderer() {
   DCHECK(IsCurrent(nullptr));
   const char *renderer =
       reinterpret_cast<const char*>(glGetString(GL_RENDERER));
   return std::string(renderer ? renderer : "");
 }
 
+gl::YUVToRGBConverter* GLContext::GetYUVToRGBConverter() {
+  return nullptr;
+}
+
 bool GLContext::HasExtension(const char* name) {
   std::string extensions = GetExtensions();
   extensions += " ";
 
   std::string delimited_name(name);
   delimited_name += " ";
 
   return extensions.find(delimited_name) != std::string::npos;
 }
 
@@ skipping 114 matching lines @@
 }
 
 GLContextReal::~GLContextReal() {}
 
 void GLContextReal::SetCurrent(GLSurface* surface) {
   GLContext::SetCurrent(surface);
   current_real_context_.Pointer()->Set(surface ? this : nullptr);
 }
 
 }  // namespace gfx