Respect the disabled extension list during binding initialization.

ui/gl/gl_bindings.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_BINDINGS_H_
 #define UI_GL_GL_BINDINGS_H_
 
 #include <string>
 
 // Includes the platform independent and platform dependent GL headers.
@@ skipping 327 matching lines @@
   ProcsGL debug_fn;
   ExtensionsGL ext;
   bool null_draw_bindings_enabled;
 
  private:
   void InitializeDynamicBindings(GLContext* context);
 };
 
 struct GL_EXPORT DriverOSMESA {
   void InitializeStaticBindings();
+  void InitializeExtensionBindings();
   void InitializeDebugBindings();
   void ClearBindings();
 
   ProcsOSMESA fn;
   ProcsOSMESA debug_fn;
   ExtensionsOSMESA ext;
 
  private:
   static std::string GetPlatformExtensions();
 };
 
 #if defined(OS_WIN)
 struct GL_EXPORT DriverWGL {
   void InitializeStaticBindings();
+  void InitializeExtensionBindings();
   void InitializeDebugBindings();
   void ClearBindings();
 
   ProcsWGL fn;
   ProcsWGL debug_fn;
   ExtensionsWGL ext;
 
  private:
   static std::string GetPlatformExtensions();
 };
 #endif
 
 #if defined(OS_WIN) || defined(USE_X11) || defined(OS_ANDROID) || defined(USE_OZONE)
 struct GL_EXPORT DriverEGL {
   void InitializeStaticBindings();
+  void InitializeExtensionBindings();
   void InitializeDebugBindings();
   void ClearBindings();
 
   ProcsEGL fn;
   ProcsEGL debug_fn;
   ExtensionsEGL ext;
 
   static std::string GetPlatformExtensions();
   static std::string GetClientExtensions();
 };
 #endif
 
 #if defined(USE_X11)
 struct GL_EXPORT DriverGLX {
   void InitializeStaticBindings();
+  void InitializeExtensionBindings();
   void InitializeDebugBindings();
   void ClearBindings();
 
   ProcsGLX fn;
   ProcsGLX debug_fn;
   ExtensionsGLX ext;
 
  private:
   static std::string GetPlatformExtensions();
 };
@@ skipping 29 matching lines @@
 #elif defined(OS_ANDROID)
 
 GL_EXPORT extern EGLApi* g_current_egl_context;
 GL_EXPORT extern DriverEGL g_driver_egl;
 
 #endif
 
 }  // namespace gfx
 
 #endif  // UI_GL_GL_BINDINGS_H_