Attempt 2 at Fixes crash introduced @ 153047 (you can hit crash by maximizing a

ash/wm/window_animations.cc

Index: ash/wm/window_animations.cc
diff --git a/ash/wm/window_animations.cc b/ash/wm/window_animations.cc
index 387d44777d2bc07cb73a57688c9472d6ebb256ad..48afe8d8ee2de16e5199dad83bef89c9a869c1bd 100644
--- a/ash/wm/window_animations.cc
+++ b/ash/wm/window_animations.cc
@@ -50,7 +50,6 @@ namespace internal {
 namespace {
 const float kWindowAnimation_Vertical_TranslateY = 15.f;
 
-bool delayed_old_layer_deletion_in_cross_fade_for_test_ = false;
 }
 
 DEFINE_WINDOW_PROPERTY_KEY(WindowVisibilityAnimationType,
@@ -661,13 +660,7 @@ class CrossFadeObserver : public ui::CompositorObserver,
 
   // ui::ImplicitAnimationObserver overrides:
   virtual void OnImplicitAnimationsCompleted() OVERRIDE {
-    // ImplicitAnimationObserver's base class uses the object after
-    // calling this function, so we cannot delete |this|. The |layer_|
-    // may be gone by the next message loop run when shutting down, so
-    // clean them up now.
-    if (!delayed_old_layer_deletion_in_cross_fade_for_test_)
-      Cleanup();
-    MessageLoop::current()->DeleteSoon(FROM_HERE, this);
+    delete this;
   }
 
  private:
@@ -974,9 +967,5 @@ bool AnimateOnChildWindowVisibilityChanged(aura::Window* window, bool visible) {
   }
 }
 
-void SetDelayedOldLayerDeletionInCrossFadeForTest(bool value) {
-  delayed_old_layer_deletion_in_cross_fade_for_test_ = value;
-}
-
 }  // namespace internal
 }  // namespace ash