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

ash/launcher/launcher_button.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_button.h"
 
 #include <algorithm>
 
 #include "ash/launcher/launcher_button_host.h"
 #include "grit/ash_resources.h"
@@ skipping 286 matching lines @@
 void LauncherButton::OnFocus() {
   AddState(STATE_FOCUSED);
   CustomButton::OnFocus();
 }
 
 void LauncherButton::OnBlur() {
   ClearState(STATE_FOCUSED);
   CustomButton::OnBlur();
 }
 
-ui::EventResult LauncherButton::OnGestureEvent(ui::GestureEvent* event) {
+void LauncherButton::OnGestureEvent(ui::GestureEvent* event) {
   switch (event->type()) {
     case ui::ET_GESTURE_TAP_DOWN:
       AddState(STATE_HOVERED);
       return CustomButton::OnGestureEvent(event);
     case ui::ET_GESTURE_END:
       ClearState(STATE_HOVERED);
       return CustomButton::OnGestureEvent(event);
     case ui::ET_GESTURE_SCROLL_BEGIN:
       host_->PointerPressedOnButton(this, LauncherButtonHost::TOUCH, *event);
-      return ui::ER_CONSUMED;
+      event->SetHandled();
+      return;
     case ui::ET_GESTURE_SCROLL_UPDATE:
       host_->PointerDraggedOnButton(this, LauncherButtonHost::TOUCH, *event);
-      return ui::ER_CONSUMED;
+      event->SetHandled();
+      return;
     case ui::ET_GESTURE_SCROLL_END:
     case ui::ET_SCROLL_FLING_START:
       host_->PointerReleasedOnButton(this, LauncherButtonHost::TOUCH, false);
-      return ui::ER_CONSUMED;
+      event->SetHandled();
+      return;
     default:
       return CustomButton::OnGestureEvent(event);
   }
 }
 
 void LauncherButton::Init() {
   icon_view_ = CreateIconView();
 
   // TODO: refactor the layers so each button doesn't require 2.
   icon_view_->SetPaintToLayer(true);
@@ skipping 56 matching lines @@
       bar_->SetVerticalAlignment(views::ImageView::CENTER);
       break;
   }
 
   Layout();
   SchedulePaint();
 }
 
 }  // namespace internal
 }  // namespace ash