Make ToplevelWindowEventFilter and WorkspaceEventFilter into event handlers.

ash/wm/workspace/workspace_event_filter.h

Index: ash/wm/workspace/workspace_event_filter.h
===================================================================
--- ash/wm/workspace/workspace_event_filter.h	(revision 155914)
+++ ash/wm/workspace/workspace_event_filter.h	(working copy)
@@ -1,60 +0,0 @@
-// 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_EVENT_FILTER_H_
-#define ASH_WM_WORKSPACE_WORKSPACE_EVENT_FILTER_H_
-
-#include "ash/wm/toplevel_window_event_filter.h"
-#include "ash/wm/workspace/multi_window_resize_controller.h"
-
-namespace aura {
-class Window;
-}
-
-namespace ash {
-namespace internal {
-
-class WorkspaceEventFilterTestHelper;
-
-class WorkspaceEventFilter : public ToplevelWindowEventFilter {
- public:
-  explicit WorkspaceEventFilter(aura::Window* owner);
-  virtual ~WorkspaceEventFilter();
-
-  // Overridden from ToplevelWindowEventFilter:
-  virtual bool PreHandleMouseEvent(aura::Window* target,
-                                   ui::MouseEvent* event) OVERRIDE;
-  virtual ui::EventResult PreHandleGestureEvent(
-      aura::Window* target,
-      ui::GestureEvent* event) OVERRIDE;
-
- protected:
-  // Overridden from ToplevelWindowEventFilter:
-  virtual WindowResizer* CreateWindowResizer(
-      aura::Window* window,
-      const gfx::Point& point_in_parent,
-      int window_component) OVERRIDE;
-
- private:
-  friend class WorkspaceEventFilterTestHelper;
-
-  // Determines if |event| corresponds to a double click on either the top or
-  // bottom vertical resize edge, and if so toggles the vertical height of the
-  // window between its restored state and the full available height of the
-  // workspace.
-  void HandleVerticalResizeDoubleClick(aura::Window* target,
-                                       ui::MouseEvent* event);
-
-  MultiWindowResizeController multi_window_resize_controller_;
-
-  // If non-NULL, set to true in the destructor.
-  bool* destroyed_;
-
-  DISALLOW_COPY_AND_ASSIGN(WorkspaceEventFilter);
-};
-
-}  // namespace internal
-}  // namespace ash
-
-#endif  // ASH_WM_WORKSPACE_WORKSPACE_EVENT_FILTER_H_