chromeos: Move files in //ash/common to //ash, part 2

ash/common/wm/wm_window_animations.cc

-// 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.
-
-#include "ash/common/wm/wm_window_animations.h"
-
-#include "ui/compositor/layer.h"
-#include "ui/gfx/transform.h"
-
-namespace ash {
-
-void SetTransformForScaleAnimation(ui::Layer* layer,
-                                   LayerScaleAnimationDirection type) {
-  // Scales for windows above and below the current workspace.
-  const float kLayerScaleAboveSize = 1.1f;
-  const float kLayerScaleBelowSize = .9f;
-
-  const float scale = type == LAYER_SCALE_ANIMATION_ABOVE
-                          ? kLayerScaleAboveSize
-                          : kLayerScaleBelowSize;
-  gfx::Transform transform;
-  transform.Translate(-layer->bounds().width() * (scale - 1.0f) / 2,
-                      -layer->bounds().height() * (scale - 1.0f) / 2);
-  transform.Scale(scale, scale);
-  layer->SetTransform(transform);
-}
-
-}  // namespace ash