Revert of Make GL bindings conditional

ui/gl/gl_wgl_api_implementation.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_WGL_API_IMPLEMENTATION_H_
 #define UI_GL_GL_WGL_API_IMPLEMENTATION_H_
 
 #include "base/compiler_specific.h"
 #include "ui/gl/gl_bindings.h"
 #include "ui/gl/gl_export.h"
 
 namespace gfx {
 
 class GLContext;
 struct GLWindowSystemBindingInfo;
 
 void InitializeStaticGLBindingsWGL();
+void InitializeDynamicGLBindingsWGL(GLContext* context);
 void InitializeDebugGLBindingsWGL();
 void ClearGLBindingsWGL();
 bool GetGLWindowSystemBindingInfoWGL(GLWindowSystemBindingInfo* info);
 
 class GL_EXPORT WGLApiBase : public WGLApi {
  public:
   // Include the auto-generated part of this class. We split this because
   // it means we can easily edit the non-auto generated parts right here in
   // this file instead of having to edit some template or the code generator.
   #include "gl_bindings_api_autogen_wgl.h"
@@ skipping 27 matching lines @@
  private:
   WGLApi* wgl_api_;
 };
 
 }  // namespace gfx
 
 #endif  // UI_GL_GL_WGL_API_IMPLEMENTATION_H_