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

ash/wm/workspace/workspace_cycler.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_WM_WORKSPACE_WORKSPACE_CYCLER_H_
 #define ASH_WM_WORKSPACE_WORKSPACE_CYCLER_H_
 
 #include "ash/ash_export.h"
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "ui/base/events/event_handler.h"
 
 namespace ash {
 namespace internal {
 
 class WorkspaceManager;
 
 // Class to enable quick workspace switching (scrubbing) via 3 finger vertical
 // scroll.
 class ASH_EXPORT WorkspaceCycler : public ui::EventHandler {
  public:
   explicit WorkspaceCycler(WorkspaceManager* workspace_manager);
   virtual ~WorkspaceCycler();
 
  private:
   // ui::EventHandler overrides:
-  virtual ui::EventResult OnScrollEvent(ui::ScrollEvent* event) OVERRIDE;
+  virtual void OnScrollEvent(ui::ScrollEvent* event) OVERRIDE;
 
   WorkspaceManager* workspace_manager_;
 
   // Whether the user is scrubbing through workspaces.
   bool scrubbing_;
 
   // The amount of scrolling which has occurred since the last time the
   // workspace was switched. If scrubbing has just begun, |scroll_x_| and
   // |scroll_y_| are set to 0.
   int scroll_x_;
   int scroll_y_;
 
   DISALLOW_COPY_AND_ASSIGN(WorkspaceCycler);
 };
 
 }  // namespace internal
 }  // namespace ash
 
 #endif  // ASH_WM_WORKSPACE_WORKSPACE_CYCLER_H_