Make exception thrown via v8 public API propagate to v8::TryCatch as JS thrown exceptions do.

src/handles.h

Index: src/handles.h
diff --git a/src/handles.h b/src/handles.h
index a357a009fa88556fbecf54d8e3a8ef16618b206d..3839f37a9e88c3d4977be8c700f4d2893a2b35a9 100644
--- a/src/handles.h
+++ b/src/handles.h
@@ -244,6 +244,11 @@ Handle<Object> GetProperty(Handle<JSObject> obj,
 Handle<Object> GetProperty(Handle<Object> obj,
                            Handle<Object> key);
 
+Handle<Object> GetProperty(Handle<JSObject> obj,
+                           Handle<String> name,
+                           LookupResult* result);
+
+
 Handle<Object> GetElement(Handle<Object> obj,
                           uint32_t index);