Use webkit in android and windows

**I'm submitting a bug report**
**I'm submitting a feature request**

* **Library Version:**
major.minor.patch-pre

**Please tell us about your environment:**
* **Operating System:**
OSX 10.x|Linux (distro)|Windows [7|8|8.1|10]

* **Node Version:**
6.2.0

* **NPM Version:**
3.8.9

* **JSPM OR Webpack AND Version**
JSPM 0.16.32 | webpack 2.1.0-beta.17

* **Browser:**
all | Chrome XX | Firefox XX | Edge XX | IE XX | Safari XX | Mobile Chrome XX | Android X.X Web Browser | iOS XX Safari | iOS XX UIWebView | iOS XX WKWebView

* **Language:**
all | TypeScript X.X | ESNext

**Current behavior:**

**Expected/desired behavior:**

* **What is the expected behavior?**

* **What is the motivation / use case for changing the behavior?**

The issue names no files, tests, reproduction steps, or entry points. First clarify whether this is a bug or feature request and document the Android and Windows WebKit behavior to change. A completed fix would require an agreed expected behavior and a reproducible validation path.

Written by the indexing model from the issue text.