Enlarge size of touch target for several location bar buttons without affecting visual layout.

chrome/browser/ui/views/location_bar/touchable_location_bar_view.cc

+// 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.
+
+#include "chrome/browser/ui/views/location_bar/touchable_location_bar_view.h"
+
+#include "chrome/browser/ui/views/location_bar/location_bar_view.h"
+#include "ui/base/layout.h"
+#include "ui/views/border.h"
+
+void TouchableLocationBarViewBase::Init() {
+  if (ui::GetDisplayLayout() == ui::LAYOUT_TOUCH) {
+    SetBorder(3, touch_horizontal_padding());
+  }
+}
+
+int TouchableLocationBarViewBase::GetBuiltInHorizontalPadding() const {
+  return ui::GetDisplayLayout() == ui::LAYOUT_TOUCH ?
+      touch_horizontal_padding() : 0;
+}
+
+int TouchableLocationBarViewBase::touch_horizontal_padding() const {
+  return LocationBarView::GetItemPadding() / 2;
+}