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

ash/system/tray/tray_notification_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 "ash/system/tray/tray_notification_view.h"
 
 #include "ash/system/tray/system_tray_item.h"
 #include "ash/system/tray/tray_constants.h"
 #include "grit/ash_strings.h"
 #include "grit/ui_resources.h"
@@ skipping 106 matching lines @@
 void TrayNotificationView::ButtonPressed(views::Button* sender,
                                          const ui::Event& event) {
   HandleClose();
 }
 
 bool TrayNotificationView::OnMousePressed(const ui::MouseEvent& event) {
   HandleClickAction();
   return true;
 }
 
-ui::EventResult TrayNotificationView::OnGestureEvent(ui::GestureEvent* event) {
-  if (SlideOutView::OnGestureEvent(event) == ui::ER_CONSUMED)
-    return ui::ER_CONSUMED;
+void TrayNotificationView::OnGestureEvent(ui::GestureEvent* event) {
+  SlideOutView::OnGestureEvent(event);
+  if (event->handled())
+    return;
   if (event->type() != ui::ET_GESTURE_TAP)
-    return ui::ER_UNHANDLED;
+    return;
   HandleClickAction();
-  return ui::ER_CONSUMED;
+  event->SetHandled();
 }
 
 void TrayNotificationView::OnClose() {
 }
 
 void TrayNotificationView::OnClickAction() {
 }
 
 void TrayNotificationView::OnSlideOut() {
   owner_->HideNotificationView();
 }
 
 void TrayNotificationView::HandleClose() {
   OnClose();
   owner_->HideNotificationView();
 }
 
 void TrayNotificationView::HandleClickAction() {
   HandleClose();
   OnClickAction();
 }
 
 }  // namespace internal
 }  // namespace ash