Remove unused in-process pepper APIs

ppapi/cpp/dev/widget_dev.h

-// 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.
-
-#ifndef PPAPI_CPP_DEV_WIDGET_DEV_H_
-#define PPAPI_CPP_DEV_WIDGET_DEV_H_
-
-#include "ppapi/c/pp_stdint.h"
-#include "ppapi/cpp/resource.h"
-
-namespace pp {
-
-class ImageData;
-class InputEvent;
-class Rect;
-
-// This is the base class for widget elements.  As such, it can't be created
-// directly.
-class Widget_Dev : public Resource {
- public:
-  // Creates an is_null() Widget object.
-  Widget_Dev() {}
-
-  explicit Widget_Dev(PP_Resource resource);
-  Widget_Dev(const Widget_Dev& other);
-
-  // PPB_Widget methods:
-  bool Paint(const Rect& rect, ImageData* image);
-  bool HandleEvent(const InputEvent& event);
-  bool GetLocation(Rect* location);
-  void SetLocation(const Rect& location);
-  void SetScale(float scale);
-};
-
-}  // namespace pp
-
-#endif  // PPAPI_CPP_DEV_WIDGET_DEV_H_