chore(test): disable tests based on Intl API in non-Chrome browsers

Closes #3692

modules/angular2/src/pipes/date_pipe.ts

@@ -21,6 +21,9 @@ import {Pipe} from '../core/metadata';
 var defaultLocale: string = 'en-US';
 
 /**
+ * WARNING: this pipe uses the Internationalization API.
+ * Therefore it is only reliable in Chrome and Opera browsers.
+ *
  * Formats a date value to a string based on the requested format.
  *
  * # Usage

modules/angular2/src/pipes/number_pipe.ts

@@ -57,6 +57,9 @@ export class NumberPipe {
 }
 
 /**
+ * WARNING: this pipe uses the Internationalization API.
+ * Therefore it is only reliable in Chrome and Opera browsers.
+ *
  * Formats a number as local text. i.e. group sizing and seperator and other locale-specific
  * configurations are based on the active locale.
  *
@@ -92,6 +95,9 @@ export class DecimalPipe extends NumberPipe implements PipeTransform {
 }
 
 /**
+ * WARNING: this pipe uses the Internationalization API.
+ * Therefore it is only reliable in Chrome and Opera browsers.
+ *
  * Formats a number as local percent.
  *
  * # Usage
@@ -111,6 +117,9 @@ export class PercentPipe extends NumberPipe implements PipeTransform {
 }
 
 /**
+ * WARNING: this pipe uses the Internationalization API.
+ * Therefore it is only reliable in Chrome and Opera browsers.
+ *
  * Formats a number as local currency.
  *
  * # Usage

modules/angular2/src/test_lib/utils.ts

@@ -85,3 +85,10 @@ export function stringifyElement(el): string {
 
   return result;
 }
+
+// The Intl API is only properly supported in Chrome and Opera.
+// Note: Edge is disguised as Chrome 42, so checking the "Edge" part is needed,
+// see https://msdn.microsoft.com/en-us/library/hh869301(v=vs.85).aspx
+export function supportsIntlApi(): boolean {
+  return DOM.getUserAgent().indexOf('Chrome') > -1 && DOM.getUserAgent().indexOf('Edge') == -1;
+}