[WIP][NotForLand] IDL dictionary support

Source/bindings/core/v8/DictionaryHelperForCore.cpp

Index: Source/bindings/core/v8/DictionaryHelperForCore.cpp
diff --git a/Source/bindings/core/v8/DictionaryHelperForCore.cpp b/Source/bindings/core/v8/DictionaryHelperForCore.cpp
index dc872c6d5e129a1df9fc5d1439d05f6fe2339fc4..33f3ccd9fe2919b6655cd2e04c9bf79a871972f8 100644
--- a/Source/bindings/core/v8/DictionaryHelperForCore.cpp
+++ b/Source/bindings/core/v8/DictionaryHelperForCore.cpp
@@ -390,6 +390,36 @@ bool DictionaryHelper::get(const Dictionary& dictionary, const String& key, Vect
     return true;
 }
 
+// FIXME: Remove this special casing. We should either remove DictionaryHelper
+// completely, or auto-generate DictionaryHelper::get<T>() if needed.
+template <>
+bool DictionaryHelper::get(const Dictionary& dictionary, const String& key, RefPtrWillBeMember<Element>& value)
+{
+    v8::Local<v8::Value> v8Value;
+    if (!dictionary.get(key, v8Value))
+        return false;
+
+    value = V8Element::toNativeWithTypeCheck(dictionary.isolate(), v8Value);
+    return true;
+}
+
+// FIXME: Remove this. See above comment.
+template <>
+bool DictionaryHelper::get(const Dictionary& dictionary, const String& key, WillBeHeapVector<RefPtrWillBeMember<Element> >& value)
+{
+    v8::Local<v8::Value> v8Value;
+    if (!dictionary.get(key, v8Value))
+        return false;
+    if (!v8Value->IsArray())
+        return false;
+    v8::Local<v8::Array> v8Array = v8::Local<v8::Array>::Cast(v8Value);
+    for (size_t i = 0; i < v8Array->Length(); ++i) {
+        v8::Local<v8::Value> indexedValue = v8Array->Get(v8::Uint32::New(dictionary.isolate(), i));
+        value.append(V8Element::toNativeWithTypeCheck(dictionary.isolate(), indexedValue));
+    }
+    return true;
+}
+
 template <>
 bool DictionaryHelper::convert(const Dictionary& dictionary, Dictionary::ConversionContext& context, const String& key, Vector<String>& value)
 {