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

tools/dom/scripts/generator.py

Index: tools/dom/scripts/generator.py
diff --git a/tools/dom/scripts/generator.py b/tools/dom/scripts/generator.py
index e7cff303889763283291445d1c77d1a197f3773b..555e12549a94cfe7db30a896b44f8fa1a80b266f 100644
--- a/tools/dom/scripts/generator.py
+++ b/tools/dom/scripts/generator.py
@@ -628,6 +628,11 @@ _indexed_db_annotations = [
   "@Experimental()",
 ]
 
+_file_system_annotations = [
+  "@SupportedBrowser(SupportedBrowser.CHROME)",
+  "@Experimental()",
+]
+
 _all_but_ie9_annotations = [
   "@SupportedBrowser(SupportedBrowser.CHROME)",
   "@SupportedBrowser(SupportedBrowser.FIREFOX)",
@@ -645,10 +650,14 @@ dart_annotations = {
   'ArrayBuffer': _all_but_ie9_annotations,
   'ArrayBufferView': _all_but_ie9_annotations,
   'DOMWindow.indexedDB': _indexed_db_annotations,
+  'DOMWindow.webkitRequestFileSystem': _file_system_annotations,
+  'DOMWindow.webkitResolveLocalFileSystemURL': _file_system_annotations,
   'Element.webkitCreateShadowRoot': [
     "@SupportedBrowser(SupportedBrowser.CHROME, '25')",
     "@Experimental()",
   ],
+  'FileSystem': _file_system_annotations,
+  'FileSystemSync': _file_system_annotations,
   'History.pushState': _history_annotations,
   'History.replaceState': _history_annotations,
   'HTMLContentElement': [
@@ -704,6 +713,10 @@ dart_annotations = {
   ],
   'WebSocket': _all_but_ie9_annotations,
   'WorkerContext.indexedDB': _indexed_db_annotations,
+  'WorkerContext.webkitRequestFileSystem': _file_system_annotations,
+  'WorkerContext.webkitRequestFileSystemSync': _file_system_annotations,
+  'WorkerContext.webkitResolveLocalFileSystemSyncURL': _file_system_annotations,
+  'WorkerContext.webkitResolveLocalFileSystemURL': _file_system_annotations,
 }
 
 def FindCommonAnnotations(interface_name, member_name=None):