refactor(browser): merge static & dynamic platforms

modules/@angular/platform-browser/src/xhr/xhr_impl.ts

@@ -0,0 +1,39 @@
+import {XHR} from '@angular/compiler';
+import {PromiseWrapper, PromiseCompleter} from '../../src/facade/promise';
+import {isPresent} from '../../src/facade/lang';
+
+export class XHRImpl extends XHR {
+  get(url: string): Promise<string> {
+    var completer: PromiseCompleter < string >= PromiseWrapper.completer();
+    var xhr = new XMLHttpRequest();
+    xhr.open('GET', url, true);
+    xhr.responseType = 'text';
+
+    xhr.onload = function() {
+      // responseText is the old-school way of retrieving response (supported by IE8 & 9)
+      // response/responseType properties were introduced in XHR Level2 spec (supported by IE10)
+      var response = isPresent(xhr.response) ? xhr.response : xhr.responseText;
+
+      // normalize IE9 bug (http://bugs.jquery.com/ticket/1450)
+      var status = xhr.status === 1223 ? 204 : xhr.status;
+
+      // 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 = response ? 200 : 0;
+      }
+
+      if (200 <= status && status <= 300) {
+        completer.resolve(response);
+      } else {
+        completer.reject(`Failed to load ${url}`, null);
+      }
+    };
+
+    xhr.onerror = function() { completer.reject(`Failed to load ${url}`, null); };
+
+    xhr.send();
+    return completer.promise;
+  }
+}