[Refactor] Move the logic to update bounds for show type from WorkspaceLayoutManager to DefaultState

ash/wm/default_state.h

 // Copyright 2014 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_DEFAULT_STATE_H_
 #define ASH_WM_DEFAULT_STATE_H_
 
 #include "ash/wm/window_state.h"
 
 namespace ash {
 namespace wm {
 
 // DefaultState implements Ash behavior without state machine.
 class DefaultState : public WindowState::State {
  public:
   DefaultState();
   virtual ~DefaultState();
 
   // WindowState::State overrides:
-  virtual void OnWMEvent(WindowState* window_state,
-                         WMEvent event) OVERRIDE;
+  virtual void OnWMEvent(WindowState* window_state, WMEvent event) OVERRIDE;
+
  private:
+  // Process a stete dependent events, such as TOGGLE_MAXIMZIED,
+  // TOGGLE_FULLSCREEN.
+  static bool ProcessCompoundEvents(WindowState* window_state, WMEvent event);
+
+  // Update the window bounds according to the current and previous show type.
+  static void UpdateBoundsFromShowType(wm::WindowState* window_state,
+                                       wm::WindowShowType old_show_type);
+
   DISALLOW_COPY_AND_ASSIGN(DefaultState);
 };
 
 }  // namespace wm
 }  // namespace ash
 
 #endif  // ASH_WM_DEFAULT_STATE_H_