[Merge to M51] Fix the issue that Apps window keeps moving down to the right when reopened.

ui/wm/core/window_animations.cc

 // Copyright (c) 2012 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 "ui/wm/core/window_animations.h"
 
 #include <math.h>
 
 #include <algorithm>
 #include <vector>
@@ skipping 86 matching lines @@
       aura::Window* topmost_transient_child = NULL;
       for (++iter; iter != window_->parent()->children().end(); ++iter) {
         if (ContainsValue(transient_children, *iter))
           topmost_transient_child = *iter;
       }
       if (topmost_transient_child) {
         window_->parent()->layer()->StackAbove(
             layer_owner_->root(), topmost_transient_child->layer());
       }
     }
+    // Reset the transform for the |window_|. Because the animation may have
+    // changed the transform, when recreating the layers we need to reset the
+    // transform otherwise the recreated layer has the transform installed
+    // for the animation.
+    window_->layer()->SetTransform(gfx::Transform());
   }
 
  protected:
   // Invoked when the hiding animation is completed.  It will delete
   // 'this', and no operation should be made on this object after this
   // point.
   void OnAnimationCompleted() {
     // Window may have been destroyed by this point.
     if (window_) {
       aura::client::AnimationHost* animation_host =
@@ skipping 540 matching lines @@
   // being accessed via Remote Desktop.
   if (ui::ScopedAnimationDurationScaleMode::duration_scale_mode() ==
       ui::ScopedAnimationDurationScaleMode::NON_ZERO_DURATION)
     return false;
 
   // Let the user decide whether or not to play the animation.
   return !gfx::Animation::ShouldRenderRichAnimation();
 }
 
 }  // namespace wm