Implement InstanceMirror.== in dart2js and InstanceMirror.hashCode in the VM and …

runtime/lib/mirrors.cc

Index: runtime/lib/mirrors.cc
diff --git a/runtime/lib/mirrors.cc b/runtime/lib/mirrors.cc
index 9386f4bf915694669b5a33d2afc6924e72884c6e..f748058b969cdf299ea4b0b3805ace70b0edf2b9 100644
--- a/runtime/lib/mirrors.cc
+++ b/runtime/lib/mirrors.cc
@@ -739,6 +739,18 @@ DEFINE_NATIVE_ENTRY(TypeVariableMirror_upper_bound, 1) {
 }
 
 
+DEFINE_NATIVE_ENTRY(InstanceMirror_identityHash, 1) {
+  GET_NATIVE_ARGUMENT(Instance, reflectee, arguments->NativeArgAt(0));
+  ObjectStore* object_store = Isolate::Current()->object_store();
+  const Class& cls = Class::Handle(object_store->object_class());
+  const Function& function =
+      Function::Handle(cls.LookupDynamicFunction(Symbols::hashCode()));
+  const Array& args = Array::Handle(Array::New(1));
+  args.SetAt(0, reflectee);
+  return DartEntry::InvokeFunction(function, args);
+}
+
+
 // Invoke the function, or noSuchMethod if it is null. Propagate any unhandled
 // exceptions. Wrap and propagate any compilation errors.
 static RawObject* ReflectivelyInvokeDynamicFunction(const Instance& receiver,