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

ash/launcher/launcher_tooltip_manager.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/launcher/launcher_tooltip_manager.h"
 
 #include "ash/launcher/launcher_view.h"
 #include "ash/shell.h"
 #include "ash/shell_window_ids.h"
 #include "ash/wm/session_state_controller.h"
@@ skipping 284 matching lines @@
   return ui::ER_UNHANDLED;
 }
 
 ui::EventResult LauncherTooltipManager::OnTouchEvent(ui::TouchEvent* event) {
   aura::Window* target = static_cast<aura::Window*>(event->target());
   if (widget_ && widget_->IsVisible() && widget_->GetNativeWindow() != target)
     Close();
   return ui::ER_UNHANDLED;
 }
 
-ui::EventResult LauncherTooltipManager::OnGestureEvent(
-    ui::GestureEvent* event) {
+void LauncherTooltipManager::OnGestureEvent(ui::GestureEvent* event) {
   if (widget_ && widget_->IsVisible()) {
     // Because this mouse event may arrive to |view_|, here we just schedule
     // the closing event rather than directly calling Close().
     CloseSoon();
   }
-
-  return ui::ER_UNHANDLED;
 }
 
 void LauncherTooltipManager::OnSessionStateEvent(
     SessionStateObserver::EventType event) {
   if (event == SessionStateObserver::EVENT_PRELOCK_ANIMATION_STARTED ||
       event == SessionStateObserver::EVENT_LOCK_ANIMATION_STARTED)
     Close();
 }
 
 void LauncherTooltipManager::WillDeleteShelf() {
@@ skipping 54 matching lines @@
 
   gfx::NativeView native_view = widget_->GetNativeView();
   views::corewm::SetWindowVisibilityAnimationType(
       native_view, views::corewm::WINDOW_VISIBILITY_ANIMATION_TYPE_VERTICAL);
   views::corewm::SetWindowVisibilityAnimationTransition(
       native_view, views::corewm::ANIMATE_HIDE);
 }
 
 }  // namespace internal
 }  // namespace ash