Remove MaskedViewTargeter and its derived classes

ui/views/masked_view_targeter.h

-// Copyright 2014 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_VIEWS_MASKED_VIEW_TARGETER_H_
-#define UI_VIEWS_MASKED_VIEW_TARGETER_H_
-
-#include "ui/views/view_targeter.h"
-#include "ui/views/views_export.h"
-
-namespace gfx {
-class Path;
-}
-
-namespace views {
-
-// Derived classes of MaskedViewTargeter are used to define custom-shaped
-// hit test regions for a View used in event targeting.
-// TODO(tdanderson|sadrul): Some refactoring opportunities may be possible
-//                          between this class and MaskedWindowTargeter.
-class VIEWS_EXPORT MaskedViewTargeter : public ViewTargeter {
- public:
-  explicit MaskedViewTargeter(View* masked_view);
-  virtual ~MaskedViewTargeter();
-
-  // Sets the hit-test mask for |view| in |mask| (in |view|'s local
-  // coordinate system). Returns whether a valid mask has been set in |mask|.
-  virtual bool GetHitTestMask(const View* view, gfx::Path* mask) const = 0;
-
- protected:
-  const View* masked_view() const { return masked_view_; }
-
-  // ui::EventTargeter:
-  virtual bool EventLocationInsideBounds(
-      ui::EventTarget* target,
-      const ui::LocatedEvent& event) const OVERRIDE;
-
- private:
-  View* masked_view_;
-
-  DISALLOW_COPY_AND_ASSIGN(MaskedViewTargeter);
-};
-
-}  // namespace views
-
-#endif  // UI_VIEWS_MASKED_VIEW_TARGETER_H_