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

mojo/services/test_service/test_service_impl.h

Index: mojo/services/test_service/test_service_impl.h
diff --git a/mojo/services/test_service/test_service_impl.h b/mojo/services/test_service/test_service_impl.h
index c8e272ac8c040d879a0174d17359a0206d72c606..c921599c30d43808e566cdb24df268a75cbb81c8 100644
--- a/mojo/services/test_service/test_service_impl.h
+++ b/mojo/services/test_service/test_service_impl.h
@@ -5,6 +5,7 @@
 #ifndef MOJO_SERVICES_TEST_SERVICE_TEST_SERVICE_IMPL_H_
 #define MOJO_SERVICES_TEST_SERVICE_TEST_SERVICE_IMPL_H_
 
+#include "base/memory/scoped_ptr.h"
 #include "mojo/public/cpp/system/macros.h"
 #include "mojo/services/test_service/test_service.mojom.h"
 
@@ -12,21 +13,30 @@ namespace mojo {
 class ApplicationConnection;
 namespace test {
 
+class TestRequestTrackerClientImpl;
 class TestServiceApplication;
 
-class TestServiceImpl : public InterfaceImpl<ITestService> {
+class TestServiceImpl : public InterfaceImpl<TestService> {
  public:
-  explicit TestServiceImpl(ApplicationConnection* connection,
-                           TestServiceApplication* application);
+  TestServiceImpl(ApplicationConnection* connection,
+                  TestServiceApplication* application);
   virtual ~TestServiceImpl();
 
-  // |ITestService| methods:
+  // |TestService| methods:
   virtual void OnConnectionEstablished() MOJO_OVERRIDE;
   virtual void OnConnectionError() MOJO_OVERRIDE;
   virtual void Ping(const mojo::Callback<void()>& callback) MOJO_OVERRIDE;
+  virtual void ConnectToAppAndGetTime(
+      const mojo::String& app_url,
+      const mojo::Callback<void(int64_t)>& callback) MOJO_OVERRIDE;
+  virtual void StartTrackingRequests(const mojo::Callback<void()>& callback)
+      MOJO_OVERRIDE;
 
  private:
   TestServiceApplication* const application_;
+  ApplicationConnection* const connection_;
+  TestTimeServicePtr time_service_;
+  scoped_ptr<TestRequestTrackerClientImpl> tracking_;
 
   MOJO_DISALLOW_COPY_AND_ASSIGN(TestServiceImpl);
 };