Take GL version and extensions correctly into account when binding functions

ui/gl/gl_surface.h

 // 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.
 
 #ifndef UI_GL_GL_SURFACE_H_
 #define UI_GL_GL_SURFACE_H_
 
 #include <string>
 
 #include "base/memory/ref_counted.h"
 #include "build/build_config.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/gfx/size.h"
 #include "ui/gl/gl_export.h"
+#include "ui/gl/gl_implementation.h"
 
 namespace gfx {
 
 class GLContext;
 class VSyncProvider;
 
 // Encapsulates a surface that can be rendered to with GL, hiding platform
 // specific management.
 class GL_EXPORT GLSurface : public base::RefCounted<GLSurface> {
  public:
@@ skipping 77 matching lines @@
       gfx::AcceleratedWidget window);
 
   // Create a GL surface used for offscreen rendering.
   static scoped_refptr<GLSurface> CreateOffscreenGLSurface(
       const gfx::Size& size);
 
   static GLSurface* GetCurrent();
 
  protected:
   virtual ~GLSurface();
+  static bool InitializePreBindingsInternal(GLImplementation impl);
   static bool InitializeOneOffInternal();
   static void SetCurrent(GLSurface* surface);
 
   static bool ExtensionsContain(const char* extensions, const char* name);
 
  private:
   friend class base::RefCounted<GLSurface>;
   friend class GLContext;
 
   DISALLOW_COPY_AND_ASSIGN(GLSurface);
@@ skipping 33 matching lines @@
 
  private:
   scoped_refptr<GLSurface> surface_;
 
   DISALLOW_COPY_AND_ASSIGN(GLSurfaceAdapter);
 };
 
 }  // namespace gfx
 
 #endif  // UI_GL_GL_SURFACE_H_