Unify Object implementation across dart2js and VM.

lib/compiler/implementation/lib/coreimpl_patch.dart

Index: lib/compiler/implementation/lib/coreimpl_patch.dart
diff --git a/lib/compiler/implementation/lib/coreimpl_patch.dart b/lib/compiler/implementation/lib/coreimpl_patch.dart
index d48cafe2a2e68d31c025f486d57a4788a957aaa8..5e5659ac332681c3018f032c151d898f685de302 100644
--- a/lib/compiler/implementation/lib/coreimpl_patch.dart
+++ b/lib/compiler/implementation/lib/coreimpl_patch.dart
@@ -4,6 +4,20 @@
 
 // Patch file for dart:core classes.
 
+// Path for Object implementation.
+// TODO(ager): Split out into object_patch.dart and allow #source
+// in patch files?
+patch class ObjectImplementation {
+  patch static String toStringImpl(Object object) {
+    return Primitives.objectToString(object);
+  }
+
+  patch static void noSuchMethodImpl(Object object, String name, List args) {
+    throw new NoSuchMethodException(object, name, args);
+  }
+}
+
+
 // Patch for Date implementation.
 // TODO(ager): Split out into date_patch.dart and allow #source
 // in patch files?