Renderer.animate(...).play() resets animation to its initial state on finish #12456

I'm submitting a ... (check one with "x")

[x] bug report
[ ] feature request
[ ] support request

Current behavior
When Renderer.animate(...).play() is called, the animation is played back correctly, but immediately jumps to the initial state once finished. The default 'fill' : 'both' option passed into the constructor of WebAnimationsPlayer by WebAnimationsDriver has no effect due to an explicit call to this._player.reset() being performed from within WebAnimationsPlayer.destroy().

Expected behavior
Finished animations should not be reset by the destructor of WebAnimationsPlayer.

Minimal reproduction of the problem with instructions

At the end of the animation, the element jumps right back to its initial position:
this._renderer.animate( element.nativeElement, { styles: [{transform : 'translate(0, 0)'}] }, [ { offset: 1, styles: { styles: [{transform : 'translate(100px, 200px)'}] } } ], 5000, 0, 'ease' ).play();

What is the motivation / use case for changing the behavior?
Since 'fill':'both' is used by WebAnimationsDriver as the default animation-fill-mode, when animation completes the target element must have its styles set to those specified in the respective end keyframe.

Please tell us about your environment:
Win10
VS Code 1.6.1
npm 3.10.3
node 6.3.1
@angular 2.1.0
AspNet.Core 1.0.1

• Angular version: 2.1.0
• Browser: [Chrome 53 | Opera 40.0]
• Language: [TypeScript 2.0 | ES6]