Reapply DOMFormData => FormData rename. (this time with a fix for Dartium)

lib/compiler/implementation/lib/native_helper.dart

Index: lib/compiler/implementation/lib/native_helper.dart
===================================================================
--- lib/compiler/implementation/lib/native_helper.dart	(revision 11534)
+++ lib/compiler/implementation/lib/native_helper.dart	(working copy)
@@ -7,6 +7,7 @@
   if (name == 'Window') return 'DOMWindow';
   if (name == 'CanvasPixelArray') return 'Uint8ClampedArray';
   if (name == 'WebKitMutationObserver') return 'MutationObserver';
+  if (name == 'FormData') return 'DOMFormData';
   return name;
 }
 
@@ -16,12 +17,14 @@
   if (name == 'Window') return 'DOMWindow';
   if (name == 'CanvasPixelArray') return 'Uint8ClampedArray';
   if (name == 'WebKitMutationObserver') return 'MutationObserver';
+  if (name == 'FormData') return 'DOMFormData';
   return name;
 }
 
 String typeNameInOpera(obj) {
   String name = JS('String', '#', constructorNameFallback(obj));
   if (name == 'Window') return 'DOMWindow';
+  if (name == 'FormData') return 'DOMFormData';
   return name;
 }
 
@@ -33,6 +36,7 @@
   if (name == 'WorkerMessageEvent') return 'MessageEvent';
   if (name == 'DragEvent') return 'MouseEvent';
   if (name == 'DataTransfer') return 'Clipboard';
+  if (name == 'FormData') return 'DOMFormData';
   return name;
 }
 
@@ -55,6 +59,7 @@
   if (name == 'HTMLPhraseElement') return 'HTMLElement';
   if (name == 'MSStyleCSSProperties') return 'CSSStyleDeclaration';
   if (name == 'MouseWheelEvent') return 'WheelEvent';
+  if (name == 'FormData') return 'DOMFormData';
   return name;
 }