mojo: add some end-to-end shell tests and a new test sample app

mojo/services/test_service/test_request_tracker_client_impl.h

+// Copyright 2014 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.
+
+#ifndef MOJO_SERVICES_TEST_SERVICE_TEST_REQUEST_TRACKER_CLIENT_IMPL_H_
+#define MOJO_SERVICES_TEST_SERVICE_TEST_REQUEST_TRACKER_CLIENT_IMPL_H_
+
+#include "mojo/public/cpp/system/macros.h"
+#include "mojo/services/test_service/test_request_tracker.mojom.h"
+
+namespace mojo {
+namespace test {
+
+class TestRequestTrackerClientImpl : public TestRequestTrackerClient {
+ public:
+  TestRequestTrackerClientImpl(
+      TestRequestTrackerPtr tracker,
+      const std::string& service_name,
+      const mojo::Callback<void()>& tracking_connected_callback);
+  virtual ~TestRequestTrackerClientImpl();
+
+  // Call whenever an event happens that you want to be recorded.
+  void RecordNewRequest();
+
+  // TestRequestTrackerClient impl.
+  virtual void SetIdAndReturnName(
+      uint64_t id,
+      const mojo::Callback<void(mojo::String)>& callback) MOJO_OVERRIDE;
+
+ private:
+  void SendStats();
+  uint64_t id_;
+  uint64_t requests_since_upload_;
+  const std::string service_name_;
+  TestRequestTrackerPtr tracker_;
+  mojo::Callback<void()> tracking_connected_callback_;
+};
+
+}  // namespace test
+}  // namespace mojo
+
+#endif  // MOJO_SERVICES_TEST_SERVICE_TEST_REQUEST_TRACKER_CLIENT_IMPL_H_