Mojo: Make tests under mojo/public use our own run_all_unittests.cc.

mojo/public/bindings/sample/sample_test.cc

 // Copyright 2013 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 <stdio.h>
 
 #include <string>
 
 #include "mojom/sample_service.h"
 
@@ skipping 158 matching lines @@
   foo->set_files(files);
 
   mojo::Handle port = { 10 };
 
   service->Frobinate(foo, true, port);
 }
 
 }  // namespace sample
 
 int main() {
-  sample::Exercise();
+  // TODO(vtl): Convert this to a gtest and use mojo_run_all_unittests.
+  // sample::Exercise();
   return 0;
 }