Add touch gestures to views menu controls.

ui/views/controls/button/menu_button.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 "ui/views/controls/button/menu_button.h"
 
 #include "base/utf_string_conversions.h"
 #include "grit/ui_resources.h"
 #include "grit/ui_strings.h"
 #include "ui/base/accessibility/accessible_view_state.h"
 #include "ui/base/dragdrop/drag_drop_types.h"
+#include "ui/base/events.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/gfx/canvas.h"
 #include "ui/gfx/image/image.h"
 #include "ui/gfx/screen.h"
 #include "ui/views/controls/button/button.h"
 #include "ui/views/controls/button/menu_button_listener.h"
 #include "ui/views/events/event.h"
 #include "ui/views/widget/root_view.h"
 #include "ui/views/widget/widget.h"
@@ skipping 190 matching lines @@
 // we display the menu. If we don't override this method then
 // BaseButton::OnMouseExited will get the event and will set the button's state
 // to BS_NORMAL instead of keeping the state BM_PUSHED. This, in turn, will
 // cause the button to appear depressed while the menu is displayed.
 void MenuButton::OnMouseExited(const MouseEvent& event) {
   if ((state_ != BS_DISABLED) && (!menu_visible_) && (!InDrag())) {
     SetState(BS_NORMAL);
   }
 }
 
+ui::GestureStatus MenuButton::OnGestureEvent(const GestureEvent& event) {
+  if (state() != BS_DISABLED && event.type() == ui::ET_GESTURE_TAP) {
+    if (Activate())
+      return ui::GESTURE_STATUS_CONSUMED;
+  }
+  return TextButton::OnGestureEvent(event);
+}
+
 bool MenuButton::OnKeyPressed(const KeyEvent& event) {
   switch (event.key_code()) {
     case ui::VKEY_SPACE:
       // Alt-space on windows should show the window menu.
       if (event.IsAltDown())
         break;
     case ui::VKEY_RETURN:
     case ui::VKEY_UP:
     case ui::VKEY_DOWN: {
       // WARNING: we may have been deleted by the time Activate returns.
@@ skipping 23 matching lines @@
   if (!GetWidget()) {
     NOTREACHED();
     return 0;
   }
 
   gfx::Rect monitor_bounds = GetWidget()->GetWorkAreaBoundsInScreen();
   return monitor_bounds.right() - 1;
 }
 
 }  // namespace views