Add initial stub implementation of LocalActivityResolver.

components/arc/intent_helper/local_activity_resolver.cc

Index: components/arc/intent_helper/local_activity_resolver.cc
diff --git a/components/arc/intent_helper/local_activity_resolver.cc b/components/arc/intent_helper/local_activity_resolver.cc
new file mode 100644
index 0000000000000000000000000000000000000000..568cd8829435d14068bb497ac75da576645f16bf
--- /dev/null
+++ b/components/arc/intent_helper/local_activity_resolver.cc
@@ -0,0 +1,16 @@
+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "components/arc/intent_helper/local_activity_resolver.h"
+
+#include "url/gurl.h"
+
+namespace arc {
+
+bool LocalActivityResolver::ShouldChromeHandleUrl(const GURL& url) {
+  // Stub implementation for now.
+  return true;
+}
+
+}  // namespace arc