Make classes and structures in core/loader fast-allocated.

Source/core/loader/FormSubmission.h

Index: Source/core/loader/FormSubmission.h
diff --git a/Source/core/loader/FormSubmission.h b/Source/core/loader/FormSubmission.h
index ec7cc8f3b4a19d912c72cdd960660ddb42393e6f..a9b4a275f3aff4f64050bf603ef1039832ac0398 100644
--- a/Source/core/loader/FormSubmission.h
+++ b/Source/core/loader/FormSubmission.h
@@ -34,6 +34,7 @@
 #include "platform/heap/Handle.h"
 #include "platform/weborigin/KURL.h"
 #include "platform/weborigin/Referrer.h"
+#include "wtf/Allocator.h"
 
 namespace blink {
 
@@ -47,6 +48,7 @@ public:
     enum Method { GetMethod, PostMethod, DialogMethod };
 
     class Attributes {
+        DISALLOW_ALLOCATION();
         WTF_MAKE_NONCOPYABLE(Attributes);
     public:
         Attributes()