[mus+ash] Removes WmWindow from ash (app_list, frame, metrics, session, system, wallpaper)

ash/frame/header_painter_util.cc

Index: ash/frame/header_painter_util.cc
diff --git a/ash/frame/header_painter_util.cc b/ash/frame/header_painter_util.cc
index d7d79f80cbba305cf70b47b9c6c0d4f95795391a..f7f4550eae63afc3be41232f14969c0317f335fe 100644
--- a/ash/frame/header_painter_util.cc
+++ b/ash/frame/header_painter_util.cc
@@ -6,7 +6,7 @@
 
 #include <algorithm>
 
-#include "ash/wm_window.h"
+#include "ui/aura/window.h"
 #include "ui/compositor/layer.h"
 #include "ui/compositor/layer_animator.h"
 #include "ui/gfx/font_list.h"
@@ -82,13 +82,13 @@ bool HeaderPainterUtil::CanAnimateActivation(views::Widget* widget) {
   // rate.
   // TODO(sky): Expose a better way to determine this rather than assuming the
   // parent is a toplevel container.
-  WmWindow* window = WmWindow::Get(widget->GetNativeWindow());
-  // TODO(sky): GetParent()->GetLayer() is for mash until animations ported.
-  if (!window || !window->GetParent() || !window->GetParent()->GetLayer())
+  aura::Window* window = widget->GetNativeWindow();
+  // TODO(sky): parent()->layer() is for mash until animations ported.
+  if (!window || !window->parent() || !window->parent()->layer())
     return true;
 
   ui::LayerAnimator* parent_layer_animator =
-      window->GetParent()->GetLayer()->GetAnimator();
+      window->parent()->layer()->GetAnimator();
   return !parent_layer_animator->IsAnimatingProperty(
              ui::LayerAnimationElement::OPACITY) &&
          !parent_layer_animator->IsAnimatingProperty(