events: Update scroll and touch handlers to not return EventResult.

ash/tooltips/tooltip_controller.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/tooltips/tooltip_controller.h"
 
 #include <vector>
 
 #include "ash/ash_switches.h"
 #include "ash/shell.h"
@@ skipping 284 matching lines @@
       // Hide the tooltip for click, release, drag, wheel events.
       if (GetTooltip()->IsVisible())
         GetTooltip()->Hide();
       break;
     default:
       break;
   }
   return ui::ER_UNHANDLED;
 }
 
-ui::EventResult TooltipController::OnTouchEvent(ui::TouchEvent* event) {
+void TooltipController::OnTouchEvent(ui::TouchEvent* event) {
   // TODO(varunjain): need to properly implement tooltips for
   // touch events.
   // Hide the tooltip for touch events.
   if (GetTooltip()->IsVisible())
     GetTooltip()->Hide();
   if (tooltip_window_)
     tooltip_window_->RemoveObserver(this);
   tooltip_window_ = NULL;
-  return ui::ER_UNHANDLED;
 }
 
 void TooltipController::OnSessionStateEvent(
     SessionStateObserver::EventType event) {
   if (event == SessionStateObserver::EVENT_PRELOCK_ANIMATION_STARTED ||
       event == SessionStateObserver::EVENT_LOCK_ANIMATION_STARTED) {
     if (tooltip_.get() && tooltip_->IsVisible())
       tooltip_->Hide();
   }
 }
@@ skipping 156 matching lines @@
 }
 
 TooltipController::Tooltip* TooltipController::GetTooltip() {
   if (!tooltip_.get())
     tooltip_.reset(new Tooltip(this));
   return tooltip_.get();
 }
 
 }  // namespace internal
 }  // namespace ash