Removes WindowAnimationDelegate. It was never needed.

BUG=155179
TEST=none, code cleanup
R=ben@chromium.org

Review URL: https://codereview.chromium.org/11086057

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@161356 0039d316-1c4b-4281-b951-d872f2087c98

ash/ash.gyp

@@ -354,8 +354,6 @@
         'wm/video_detector.h',
         'wm/visibility_controller.cc',
         'wm/visibility_controller.h',
-        'wm/window_animation_delegate.cc',
-        'wm/window_animation_delegate.h',
         'wm/window_animations.cc',
         'wm/window_animations.h',
         'wm/window_cycle_controller.cc',

ash/wm/visibility_controller.cc

@@ -5,7 +5,6 @@
 #include "ash/wm/visibility_controller.h"
 
 #include "ash/shell.h"
-#include "ash/wm/window_animation_delegate.h"
 #include "ash/wm/window_animations.h"
 #include "ash/wm/window_properties.h"
 #include "ui/aura/window.h"
@@ -17,13 +16,8 @@ namespace internal {
 namespace {
 
 bool ShouldAnimateWindow(aura::Window* window) {
-  if (!window->parent() || !window->parent()->GetProperty(
-          internal::kChildWindowVisibilityChangesAnimatedKey))
-    return false;
-
-  WindowAnimationDelegate* delegate =
-      WindowAnimationDelegate::GetDelegate(window->parent());
-  return !delegate || delegate->ShouldAnimateWindow(window);
+  return window->parent() && window->parent()->GetProperty(
+      internal::kChildWindowVisibilityChangesAnimatedKey);
 }
 
 }  // namespace