Adding support checks for FileSystem APIs and making APIs not webkit-specific.

sdk/lib/html/dart2js/html_dart2js.dart

 library html;
 
 import 'dart:async';
 import 'dart:collection';
 import 'dart:html_common';
 import 'dart:indexed_db';
 import 'dart:isolate';
 import 'dart:json' as json;
 import 'dart:math';
 import 'dart:svg' as svg;
@@ skipping 9327 matching lines @@
   String readAsText(Blob blob, [String encoding]) native;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 /// @domName DOMFileSystem; @docsEditable true
 class FileSystem native "*DOMFileSystem" {
 
+  /**
+   * Checks if this type is supported on the current platform
+   */
+  static bool get supported => JS('bool', '!!(window.webkitRequestFileSystem)');
+
   /// @domName DOMFileSystem.name; @docsEditable true
   final String name;
 
   /// @domName DOMFileSystem.root; @docsEditable true
   final DirectoryEntry root;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
@@ skipping 12352 matching lines @@
   /// @domName Window.stop; @docsEditable true
   void stop() native;
 
   /// @domName Window.webkitConvertPointFromNodeToPage; @docsEditable true
   Point webkitConvertPointFromNodeToPage(Node node, Point p) native;
 
   /// @domName Window.webkitConvertPointFromPageToNode; @docsEditable true
   Point webkitConvertPointFromPageToNode(Node node, Point p) native;
 
   /// @domName DOMWindow.webkitRequestFileSystem; @docsEditable true
-  void webkitRequestFileSystem(int type, int size, FileSystemCallback successCallback, [ErrorCallback errorCallback]) native;
+  @JSName('webkitRequestFileSystem')
+  @SupportedBrowser(SupportedBrowser.CHROME) @Experimental()
+  void requestFileSystem(int type, int size, FileSystemCallback successCallback, [ErrorCallback errorCallback]) native;
 
   /// @domName DOMWindow.webkitResolveLocalFileSystemURL; @docsEditable true
   @JSName('webkitResolveLocalFileSystemURL')
-  void webkitResolveLocalFileSystemUrl(String url, EntryCallback successCallback, [ErrorCallback errorCallback]) native;
+  @SupportedBrowser(SupportedBrowser.CHROME) @Experimental()
+  void resolveLocalFileSystemUrl(String url, EntryCallback successCallback, [ErrorCallback errorCallback]) native;
 
 }
 
 /// @docsEditable true
 class WindowEvents extends Events {
   /// @docsEditable true
   WindowEvents(EventTarget _ptr) : super(_ptr);
 
   /// @docsEditable true
   EventListenerList get contentLoaded => this['DOMContentLoaded'];
@@ skipping 319 matching lines @@
   @JSName('removeEventListener')
   void $dom_removeEventListener(String type, EventListener listener, [bool useCapture]) native;
 
   /// @domName WorkerContext.setInterval; @docsEditable true
   int setInterval(TimeoutHandler handler, int timeout) native;
 
   /// @domName WorkerContext.setTimeout; @docsEditable true
   int setTimeout(TimeoutHandler handler, int timeout) native;
 
   /// @domName WorkerContext.webkitRequestFileSystem; @docsEditable true
-  void webkitRequestFileSystem(int type, int size, [FileSystemCallback successCallback, ErrorCallback errorCallback]) native;
+  @JSName('webkitRequestFileSystem')
+  @SupportedBrowser(SupportedBrowser.CHROME) @Experimental()
+  void requestFileSystem(int type, int size, [FileSystemCallback successCallback, ErrorCallback errorCallback]) native;
 
   /// @domName WorkerContext.webkitRequestFileSystemSync; @docsEditable true
-  FileSystemSync webkitRequestFileSystemSync(int type, int size) native;
+  @JSName('webkitRequestFileSystemSync')
+  @SupportedBrowser(SupportedBrowser.CHROME) @Experimental()
+  FileSystemSync requestFileSystemSync(int type, int size) native;
 
   /// @domName WorkerContext.webkitResolveLocalFileSystemSyncURL; @docsEditable true
   @JSName('webkitResolveLocalFileSystemSyncURL')
-  EntrySync webkitResolveLocalFileSystemSyncUrl(String url) native;
+  @SupportedBrowser(SupportedBrowser.CHROME) @Experimental()
+  EntrySync resolveLocalFileSystemSyncUrl(String url) native;
 
   /// @domName WorkerContext.webkitResolveLocalFileSystemURL; @docsEditable true
   @JSName('webkitResolveLocalFileSystemURL')
-  void webkitResolveLocalFileSystemUrl(String url, EntryCallback successCallback, [ErrorCallback errorCallback]) native;
+  @SupportedBrowser(SupportedBrowser.CHROME) @Experimental()
+  void resolveLocalFileSystemUrl(String url, EntryCallback successCallback, [ErrorCallback errorCallback]) native;
 
 
   /**
    * Gets an instance of the Indexed DB factory to being using Indexed DB.
    *
    * Use [IdbFactory.supported] to check if Indexed DB is supported on the
    * current platform.
    */
   @SupportedBrowser(SupportedBrowser.CHROME, '23.0')
   @SupportedBrowser(SupportedBrowser.FIREFOX, '15.0')
@@ skipping 4905 matching lines @@
       _position = nextPosition;
       return true;
     }
     _current = null;
     _position = _array.length;
     return false;
   }
 
   T get current => _current;
 }