Split GL binding init into core and extension part

ui/gfx/gl/gl_context.cc

 // Copyright (c) 2011 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/command_line.h"
 #include "base/logging.h"
 #include "base/threading/thread_local.h"
 #include "ui/gfx/gl/gl_context.h"
@@ skipping 63 matching lines @@
 
 void GLContext::SetCurrent(GLContext* context, GLSurface* surface) {
   current_context_.Set(context);
   GLSurface::SetCurrent(surface);
 }
 
 bool GLContext::WasAllocatedUsingARBRobustness() {
   return false;
 }
 
+bool GLContext::InitializeExtensionBindings() {
+  DCHECK(IsCurrent(NULL));
+  static bool initialized = false;
+  if (initialized)
+    return initialized;
+  initialized = InitializeGLExtensionBindings(GetGLImplementation(), this);
+  if (!initialized)
+    LOG(ERROR) << "Could not initialize extension bindings.";
+  return initialized;
+}
+
 }  // namespace gfx