Support $0, $1, ... $6, inspect, and other console api methods.

Source/bindings/dart/DartUtilities.cpp

Index: Source/bindings/dart/DartUtilities.cpp
diff --git a/Source/bindings/dart/DartUtilities.cpp b/Source/bindings/dart/DartUtilities.cpp
index 20b8dd792a6ba216b7fb3f181e7d5a09f277c1f2..5157081af994bf9494be6f37ce3880412123a5a3 100644
--- a/Source/bindings/dart/DartUtilities.cpp
+++ b/Source/bindings/dart/DartUtilities.cpp
@@ -250,13 +250,26 @@ void DartUtilities::extractListElements(Dart_Handle list, Dart_Handle& exception
     intptr_t length = 0;
     Dart_ListLength(list, &length);
     elements.reserveCapacity(length);
-    for (int i = 0; i < length; i++) {
+    for (size_t i = 0; i < length; i++) {
         Dart_Handle element = Dart_ListGetAt(list, i);
         ASSERT(!Dart_IsError(element));
         elements.append(element);
     }
 }
 
+Dart_Handle DartUtilities::toList(const Vector<Dart_Handle>& elements, Dart_Handle& exception)
+{
+    Dart_Handle ret = Dart_NewList(elements.size());
+    if (Dart_IsError(ret)) {
+        exception = ret;
+        return Dart_Null();
+    }
+    for (size_t i = 0; i < elements.size(); i++) {
+        Dart_ListSetAt(ret, i, elements[i]);
+    }
+    return ret;
+}
+
 v8::Local<v8::Context> DartUtilities::currentV8Context()
 {
     Frame* frame = DartUtilities::domWindowForCurrentIsolate()->frame();