New FormData methods: get, getAll, has, set, delete and iterable

Source/core/html/FormData.idl

Index: Source/core/html/FormData.idl
diff --git a/Source/core/html/FormData.idl b/Source/core/html/FormData.idl
index c4b1c21a830fc9368675191e9ff4a9584887b4eb..86d1b17132c9f10a7a214876c502ccfee65c48b5 100644
--- a/Source/core/html/FormData.idl
+++ b/Source/core/html/FormData.idl
@@ -28,7 +28,9 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-// https://dvcs.w3.org/hg/xhr/raw-file/tip/Overview.html#formdata
+// http://xhr.spec.whatwg.org/#interface-formdata
+
+typedef (File or ScalarValueString) FormDataEntryValue;
 
 [
     Constructor(optional HTMLFormElement form),
@@ -36,6 +38,17 @@
     ImplementedAs=DOMFormData,
     WillBeGarbageCollected,
 ] interface FormData {
-    void append(DOMString name, Blob value, optional DOMString filename);
-    void append(DOMString name, DOMString value);
+    void append(ScalarValueString name, Blob value, optional ScalarValueString filename);
+    void append(ScalarValueString name, ScalarValueString value);
+    [ImplementedAs=deleteFunction] void delete(ScalarValueString name);
+
+    // FIXME: replace 'any' with nullable union type, per spec.
+    // FormDataEntryValue? get(ScalarValueString name);
+    [CallWith=ScriptState] any get(ScalarValueString name);
+    // sequence<FormDataEntryValue> getAll(ScalarValueString name);
+    [CallWith=ScriptState] any[] getAll(ScalarValueString name);
+
+    boolean has(ScalarValueString name);
+    void set(ScalarValueString name, Blob value, optional ScalarValueString filename);
+    void set(ScalarValueString name, ScalarValueString value);
 };