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

ash/touch/touch_observer_hud.h

 // 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.
 
 #ifndef ASH_TOUCH_TOUCH_OBSERVER_HUD_H_
 #define ASH_TOUCH_TOUCH_OBSERVER_HUD_H_
 
 #include "ash/shell.h"
 #include "ui/base/events/event_handler.h"
 #include "ui/gfx/point.h"
@@ skipping 17 matching lines @@
 class TouchObserverHUD : public ui::EventHandler,
                          public views::WidgetObserver {
  public:
   TouchObserverHUD();
   virtual ~TouchObserverHUD();
 
  private:
   void UpdateTouchPointLabel(int index);
 
   // Overriden from ui::EventHandler:
-  virtual ui::EventResult OnTouchEvent(ui::TouchEvent* event) OVERRIDE;
+  virtual void OnTouchEvent(ui::TouchEvent* event) OVERRIDE;
 
   // Overridden from views::WidgetObserver:
   virtual void OnWidgetClosing(views::Widget* widget) OVERRIDE;
 
   static const int kMaxTouchPoints = 32;
 
   views::Widget* widget_;
   TouchHudCanvas* canvas_;
   views::Label* touch_labels_[kMaxTouchPoints];
   gfx::Point touch_positions_[kMaxTouchPoints];
   ui::EventType touch_status_[kMaxTouchPoints];
 
   DISALLOW_COPY_AND_ASSIGN(TouchObserverHUD);
 };
 
 }  // namespace internal
 }  // namespace ash
 
 #endif  // ASH_TOUCH_TOUCH_OBSERVER_HUD_H_