Support uninstalling ARC app from Chrome launcher

components/arc/test/fake_app_instance.cc

 // Copyright 2015 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/test/fake_app_instance.h"
 
 #include <stdint.h>
 
 #include <string>
 #include <vector>
@@ skipping 115 matching lines @@
   }
 }
 
 void FakeAppInstance::CanHandleResolution(const mojo::String& package_name,
     const mojo::String& activity,
     ScreenRectPtr dimension,
     const CanHandleResolutionCallback& callback) {
   callback.Run(true);
 }
 
+void FakeAppInstance::UninstallApp(const mojo::String& package_name,
+                                   const UninstallAppCallback& callback) {
+  callback.Run(nullptr);

[dcheng, 2016/03/08 02:18:46]

It feels a little funky that you can construct mojo::String from nullptr. Meh.

[victorhsieh0, 2016/03/08 18:02:52]

Yeah, mojo::String can be passed through IPC, so it kind of makes sense to
accept nullptr.  I now made an explicit conversion.

+}
+
 }  // namespace arc