fix(ajax): fixes error in Chrome accessing responseText when response…

…Type isn't text.

src/observable/dom/AjaxObservable.ts

@@ -295,12 +295,14 @@ export class AjaxSubscriber<T> extends Subscriber<Event> {
  if (this.readyState === 4) {
  // normalize IE9 bug (http://bugs.jquery.com/ticket/1450)
  let status: number = this.status === 1223 ? 204 : this.status;
+ let response: any = (this.responseType === 'text' ? (
+ this.response || this.responseText) : this.response);
 
  // fix status code when it is 0 (0 status is undocumented).
  // Occurs when accessing file resources or on Android 4.1 stock browser
  // while retrieving files from application cache.
  if (status === 0) {
- status = (this.response || this.responseText) ? 200 : 0;
+ status = response ? 200 : 0;
  }
 
  if (200 <= status && status < 300) {
@@ -391,4 +393,4 @@ export class AjaxTimeoutError extends AjaxError {
  constructor(xhr: XMLHttpRequest, request: AjaxRequest) {
  super('ajax timeout', xhr, request);
  }
-}
+}