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

ash/wm_window.h

Index: ash/wm_window.h
diff --git a/ash/wm_window.h b/ash/wm_window.h
index e8ca7883408acb741dc2b20c773f9f92f547c22b..e81d8566d2a3385f63c1dfc22057d5f3482abf34 100644
--- a/ash/wm_window.h
+++ b/ash/wm_window.h
@@ -268,11 +268,6 @@ class ASH_EXPORT WmWindow : public ::wm::TransientWindowObserver {
 
   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(
@@ -323,12 +318,6 @@ class ASH_EXPORT WmWindow : public ::wm::TransientWindowObserver {
   // 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);
 };