chromeos: convert more ash/wm code to aura::Window

ash/wm_window.h

 // Copyright 2016 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_WINDOW_H_
 #define ASH_WM_WINDOW_H_
 
 #include <memory>
 #include <vector>
 
@@ skipping 250 matching lines @@
   void Deactivate();
 
   void SetFullscreen(bool fullscreen);
 
   void Maximize();
   void Minimize();
   void Unminimize();
 
   std::vector<WmWindow*> GetChildren();
 
-  // Shows/hides the resize shadow. |component| is the component to show the
-  // shadow for (one of the constants in ui/base/hit_test.h).
-  void ShowResizeShadow(int component);
-  void HideResizeShadow();
-
   // Installs a resize handler on the window that makes it easier to resize
   // the window. See ResizeHandleWindowTargeter for the specifics.
   void InstallResizeHandleWindowTargeter(
       ImmersiveFullscreenController* immersive_fullscreen_controller);
 
   // See description in SetBoundsInScreen().
   void SetBoundsInScreenBehaviorForChildren(BoundsInScreenBehavior behavior);
 
   // See description of SnapToPixelBoundaryIfNecessary().
   void SetSnapsChildrenToPhysicalPixelBoundary();
@@ skipping 30 matching lines @@
 
   aura::Window* window_;
 
   bool added_transient_observer_ = false;
   base::ObserverList<WmTransientWindowObserver> transient_observers_;
 
   // If true child windows should get a slightly larger hit region to make
   // resizing easier.
   bool children_use_extended_hit_region_ = false;
 
-  // Default value for |use_empty_minimum_size_for_testing_|.
-  static bool default_use_empty_minimum_size_for_testing_;
-
-  // If true the minimum size is 0x0, default is minimum size comes from widget.
-  bool use_empty_minimum_size_for_testing_;
-
   DISALLOW_COPY_AND_ASSIGN(WmWindow);
 };
 
 }  // namespace ash
 
 #endif  // ASH_WM_WINDOW_H_