events: Change gesture-event handler in EventHandler to not return any values.

ui/views/controls/combobox/native_combobox_views.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/combobox/native_combobox_views.h"
 
 #include <algorithm>
 
 #include "grit/ui_resources.h"
 #include "ui/base/events/event.h"
@@ skipping 143 matching lines @@
   NOTREACHED();
 }
 
 void NativeComboboxViews::OnBlur() {
   NOTREACHED();
 }
 
 /////////////////////////////////////////////////////////////////
 // NativeComboboxViews, ui::EventHandler overrides:
 
-ui::EventResult NativeComboboxViews::OnGestureEvent(ui::GestureEvent* gesture) {
+void NativeComboboxViews::OnGestureEvent(ui::GestureEvent* gesture) {
   if (gesture->type() == ui::ET_GESTURE_TAP) {
     UpdateFromModel();
     ShowDropDownMenu();
-    return ui::ER_CONSUMED;
+    gesture->StopPropagation();
+    return;
   }
-  return View::OnGestureEvent(gesture);
+  View::OnGestureEvent(gesture);
 }
 
 /////////////////////////////////////////////////////////////////
 // NativeComboboxViews, NativeComboboxWrapper overrides:
 
 void NativeComboboxViews::UpdateFromModel() {
   int max_width = 0;
   const gfx::Font& font = Combobox::GetFont();
 
   MenuItemView* menu = new MenuItemView(this);
@@ skipping 188 matching lines @@
 
 #if defined(USE_AURA)
 // static
 NativeComboboxWrapper* NativeComboboxWrapper::CreateWrapper(
     Combobox* combobox) {
   return new NativeComboboxViews(combobox);
 }
 #endif
 
 }  // namespace views