[WIP][NotForLand] IDL dictionary support

Source/bindings/tests/idls/TestObject.idl

Index: Source/bindings/tests/idls/TestObject.idl
diff --git a/Source/bindings/tests/idls/TestObject.idl b/Source/bindings/tests/idls/TestObject.idl
index 4f4047aacc2d0358399234ea056d0a17cb593cd8..73ab2fd9c66ef8debf701ff8310e203e4119b035 100644
--- a/Source/bindings/tests/idls/TestObject.idl
+++ b/Source/bindings/tests/idls/TestObject.idl
@@ -33,16 +33,6 @@ enum TestEnum {"", "EnumValue1", "EnumValue2", "EnumValue3"};
 callback VoidCallbackFunction = void ();
 callback AnyCallbackFunctionOptionalAnyArg = any (optional any optionalAnyArg);
 
-dictionary TestDict {
-    boolean booleanMember;
-    long longMember1 = 1;
-};
-
-dictionary TestDictDerived : TestDict {
-    unsigned short unsignedShortMember;
-    float floatMember4 = 4.0;
-};
-
 // No extended attributes on the interface; those go in TestInterface.idl
 interface TestObject {
     // Constants
@@ -373,6 +363,10 @@ interface TestObject {
     // Enumerations
     TestEnum testEnumMethod();
     void voidMethodTestEnumArg(TestEnum testEnumTypeArg);
+    // Dictionaries
+    TestDictionary testDictionaryMethod();
+    void voidMethodTestDictionaryArg(TestDictionary testDictionaryArg);
+    void voidMethodOptionalTestDictionaryArg(optional TestDictionary optionalTestDictionaryArg);
     // Exceptional types
     Dictionary dictionaryMethod();
     NodeFilter nodeFilterMethod();