Allow non-primitive-value dictionaries to be passed to constructors for html

tools/dom/templates/html/dart2js/impl_RTCSessionDescription.darttemplate

Index: tools/dom/templates/html/dart2js/impl_RTCSessionDescription.darttemplate
diff --git a/tools/dom/templates/html/impl/impl_ImageData.darttemplate b/tools/dom/templates/html/dart2js/impl_RTCSessionDescription.darttemplate
similarity index 57%
copy from tools/dom/templates/html/impl/impl_ImageData.darttemplate
copy to tools/dom/templates/html/dart2js/impl_RTCSessionDescription.darttemplate
index c7e0977bb537c18f02357fedc6c19d2581ee1eb8..5793e3f49376b7303fc87753885b5c06afc58194 100644
--- a/tools/dom/templates/html/impl/impl_ImageData.darttemplate
+++ b/tools/dom/templates/html/dart2js/impl_RTCSessionDescription.darttemplate
@@ -3,18 +3,12 @@
 // BSD-style license that can be found in the LICENSE file.
 
 part of $LIBRARYNAME;
-$ANNOTATIONS
-class $CLASSNAME$EXTENDS$IMPLEMENTS$NATIVESPEC {
-$if DARTIUM
-  List<int> __data;
 
-  List<int> get data {
-    if (__data == null) {
-      __data = _data;
-    }
-    return __data;
+/// @domName $DOMNAME; @docsEditable true$ANNOTATIONS

[blois, 2013/02/11 17:24:33]

Ditto.

+class $CLASSNAME$EXTENDS$IMPLEMENTS$NATIVESPEC {
+  factory $CLASSNAME(Map dictionary) {
+    return JS('RtcSessionDescription', 'new RTCSessionDescription(#)',
+        convertDartToNative_SerializedScriptValue(dictionary));
   }
-$endif
-
 $!MEMBERS
 }