Remove windows/mac/ios specific code from //ui

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 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"
-
- protected:
-  WGLApiBase();
-  virtual ~WGLApiBase();
-  void InitializeBase(DriverWGL* driver);
-
-  DriverWGL* driver_;
-};
-
-class GL_EXPORT RealWGLApi : public WGLApiBase {
- public:
-  RealWGLApi();
-  virtual ~RealWGLApi();
-  void Initialize(DriverWGL* driver);
-};
-
-// Inserts a TRACE for every WGL call.
-class GL_EXPORT TraceWGLApi : public WGLApi {
- public:
-  TraceWGLApi(WGLApi* wgl_api) : wgl_api_(wgl_api) { }
-  virtual ~TraceWGLApi();
-
-  // 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"
-
- private:
-  WGLApi* wgl_api_;
-};
-
-}  // namespace gfx
-
-#endif  // UI_GL_GL_WGL_API_IMPLEMENTATION_H_
-
-
-