Adding support checks for ApplicationCache.

sdk/lib/html/dartium/html_dartium.dart

Index: sdk/lib/html/dartium/html_dartium.dart
diff --git a/sdk/lib/html/dartium/html_dartium.dart b/sdk/lib/html/dartium/html_dartium.dart
index 8b45becf1816591139c73d7145c0387667b14187..4f5a5aeb06f0529e83b373f6047721395e62d233 100644
--- a/sdk/lib/html/dartium/html_dartium.dart
+++ b/sdk/lib/html/dartium/html_dartium.dart
@@ -381,6 +381,11 @@ class AppletElement extends _Element_Merged {
 
 
 /// @domName DOMApplicationCache
+@SupportedBrowser(SupportedBrowser.CHROME)
+@SupportedBrowser(SupportedBrowser.FIREFOX)
+@SupportedBrowser(SupportedBrowser.IE, '10')
+@SupportedBrowser(SupportedBrowser.OPERA)
+@SupportedBrowser(SupportedBrowser.SAFARI)
 class ApplicationCache extends EventTarget {
   ApplicationCache.internal() : super.internal();
 
@@ -400,6 +405,9 @@ class ApplicationCache extends EventTarget {
 
   static const EventStreamProvider<Event> updateReadyEvent = const EventStreamProvider<Event>('updateready');
 
+  /// Checks if this type is supported on the current platform.
+  static bool get supported => true;
+
   /// @domName EventTarget.addEventListener, EventTarget.removeEventListener, EventTarget.dispatchEvent; @docsEditable true
   ApplicationCacheEvents get on =>
     new ApplicationCacheEvents(this);