[WIP] Allow scroll events to permanently change the default gesture handler in RootView

ui/views/controls/button/menu_button_unittest.cc

 // 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.
 
 #include "ui/views/controls/button/menu_button.h"
 
 #include "base/strings/utf_string_conversions.h"
 #include "ui/events/test/event_generator.h"
 #include "ui/views/controls/button/menu_button_listener.h"
 #include "ui/views/test/views_test_base.h"
@@ skipping 131 matching lines @@
 // Tests if the listener is notified correctly when a gesture tap happens on a
 // MenuButton that has a regular ButtonListener.
 TEST_F(MenuButtonTest, ActivateNonDropDownOnGestureTap) {
   scoped_ptr<TestButtonListener> button_listener(new TestButtonListener);
   CreateMenuButtonWithButtonListener(button_listener.get());
 
   ui::test::EventGenerator generator(GetContext(), widget()->GetNativeWindow());
   generator.GestureTapAt(gfx::Point(10, 10));
 
   // Check that MenuButton has notified the listener on gesture tap event, while
-  // it was in hovered state.
+  // it was in the normal state.
   EXPECT_EQ(button(), button_listener->last_sender());
   EXPECT_EQ(ui::ET_GESTURE_TAP, button_listener->last_event_type());
-  EXPECT_EQ(Button::STATE_HOVERED, button_listener->last_sender_state());
+  EXPECT_EQ(Button::STATE_NORMAL, button_listener->last_sender_state());
 }
 
 // Tests if the listener is notified correctly when a mouse click happens on a
 // MenuButton that has a MenuButtonListener.
 TEST_F(MenuButtonTest, ActivateDropDownOnMouseClick) {
   scoped_ptr<TestMenuButtonListener> menu_button_listener(
       new TestMenuButtonListener);
   CreateMenuButtonWithMenuButtonListener(menu_button_listener.get());
 
   ui::test::EventGenerator generator(GetContext(), widget()->GetNativeWindow());
@@ skipping 17 matching lines @@
   ui::test::EventGenerator generator(GetContext(), widget()->GetNativeWindow());
   generator.GestureTapAt(gfx::Point(10, 10));
 
   // Check that MenuButton has notified the listener, while it was in pressed
   // state.
   EXPECT_EQ(button(), menu_button_listener->last_source());
   EXPECT_EQ(Button::STATE_PRESSED, menu_button_listener->last_source_state());
 }
 
 }  // namespace views