views/location_bar: Eliminate TouchableLocationBarView.

chrome/browser/ui/views/location_bar/touchable_location_bar_view.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 CHROME_BROWSER_UI_VIEWS_LOCATION_BAR_TOUCHABLE_LOCATION_BAR_VIEW_H_
-#define CHROME_BROWSER_UI_VIEWS_LOCATION_BAR_TOUCHABLE_LOCATION_BAR_VIEW_H_
-
-#include "ui/views/view.h"
-
-// An interface for a View in within the LocationBar that knows how to
-// increase its size (without affecting visual layout) in a touch
-// layout, to increase the size of the touch target.  Its border
-// extends a few pixels up and down, which doesn't affect layout, and
-// extends half of the padding used between items in the location bar
-// to the left and right.
-//
-// To make your location bar View extend itself into the padding
-// around it to get an enlarged touch target, inherit from
-// TouchableLocationBarView interface, implement its
-// GetBuiltInHorizontalPadding method by calling
-// GetBuiltInHorizontalPaddingImpl, and call
-// TouchableLocationBarView::Init() from your constructor.
-class TouchableLocationBarView {
- public:
-  // Returns the number of pixels of built-in padding to the left and
-  // right of the image for this view.
-  virtual int GetBuiltInHorizontalPadding() const = 0;
-
- protected:
-  // Call this from the constructor (or during early initialization)
-  // of a class that inherits from TouchableLocationBarView.
-  static void Init(views::View* view);
-
-  // Use this to implement GetBuiltInHorizontalPadding().
-  static int GetBuiltInHorizontalPaddingImpl();
-};
-
-#endif  // CHROME_BROWSER_UI_VIEWS_LOCATION_BAR_TOUCHABLE_LOCATION_BAR_VIEW_H_