Fix typos in JSObject::GetHeaderSize, which just worked by accident.

R=kmillikin@chromium.org
BUG=
TEST=

Review URL: https://chromiumcodereview.appspot.com/9231025

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10432 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/objects-inl.h

@@ -1391,11 +1391,11 @@ int JSObject::GetHeaderSize() {
     case JS_VALUE_TYPE:
       return JSValue::kSize;
     case JS_ARRAY_TYPE:
-      return JSValue::kSize;
+      return JSArray::kSize;
     case JS_WEAK_MAP_TYPE:
       return JSWeakMap::kSize;
     case JS_REGEXP_TYPE:
-      return JSValue::kSize;
+      return JSRegExp::kSize;
     case JS_CONTEXT_EXTENSION_OBJECT_TYPE:
       return JSObject::kHeaderSize;
     case JS_MESSAGE_OBJECT_TYPE: