Remove FileSystem runtime flag for blink

Source/modules/filesystem/WorkerGlobalScopeFileSystem.idl

Index: Source/modules/filesystem/WorkerGlobalScopeFileSystem.idl
diff --git a/Source/modules/filesystem/WorkerGlobalScopeFileSystem.idl b/Source/modules/filesystem/WorkerGlobalScopeFileSystem.idl
index f01817aa4de0dda351e709f10c6b475fd4f7a255..7359a690b7f0081c8a69ec3715aac7c83118ee28 100644
--- a/Source/modules/filesystem/WorkerGlobalScopeFileSystem.idl
+++ b/Source/modules/filesystem/WorkerGlobalScopeFileSystem.idl
@@ -28,10 +28,10 @@ partial interface WorkerGlobalScope {
     const unsigned short TEMPORARY = 0;
     const unsigned short PERSISTENT = 1;
 
-    [RuntimeEnabled=FileSystem, MeasureAs=RequestFileSystemWorker] void webkitRequestFileSystem(unsigned short type, long long size, optional FileSystemCallback successCallback, optional ErrorCallback errorCallback);
-    [RuntimeEnabled=FileSystem, RaisesException, MeasureAs=RequestFileSystemSyncWorker] DOMFileSystemSync webkitRequestFileSystemSync(unsigned short type, long long size);
-    [RuntimeEnabled=FileSystem] void webkitResolveLocalFileSystemURL(DOMString url, EntryCallback successCallback, optional ErrorCallback errorCallback);
-    [RuntimeEnabled=FileSystem, RaisesException] EntrySync webkitResolveLocalFileSystemSyncURL(DOMString url);
+    [MeasureAs=RequestFileSystemWorker] void webkitRequestFileSystem(unsigned short type, long long size, optional FileSystemCallback successCallback, optional ErrorCallback errorCallback);
+    [RaisesException, MeasureAs=RequestFileSystemSyncWorker] DOMFileSystemSync webkitRequestFileSystemSync(unsigned short type, long long size);
+    void webkitResolveLocalFileSystemURL(DOMString url, EntryCallback successCallback, optional ErrorCallback errorCallback);
+    [RaisesException] EntrySync webkitResolveLocalFileSystemSyncURL(DOMString url);
 
-    [RuntimeEnabled=FileSystem] attribute FileErrorConstructor FileError;
+    attribute FileErrorConstructor FileError;
 };