Pass the final URL an app was loaded from to the app in Initialize().

mojo/public/cpp/application/lib/application_test_base.cc

 // 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.
 
 #include "mojo/public/cpp/application/application_test_base.h"
 
 #include "mojo/public/cpp/application/application_impl.h"
 #include "mojo/public/cpp/bindings/binding.h"
 #include "mojo/public/cpp/environment/environment.h"
 #include "mojo/public/cpp/system/message_pipe.h"
@@ skipping 29 matching lines @@
                           InterfaceRequest<Application> application_request)
       : args_(args), binding_(this, application_request.Pass()) {}
 
   void WaitForInitialize() {
     // Initialize is always the first call made on Application.
     MOJO_CHECK(binding_.WaitForIncomingMethodCall());
   }
 
  private:
   // Application implementation.
-  void Initialize(ShellPtr shell, Array<String> args) override {
+  void Initialize(ShellPtr shell,
+                  Array<String> args,
+                  const mojo::String& url) override {
     *args_ = args.Pass();
     g_application_request = binding_.Unbind();
     g_shell = shell.Pass();
   }
 
   void AcceptConnection(const String& requestor_url,
                         InterfaceRequest<ServiceProvider> services,
                         ServiceProviderPtr exposed_services) override {
     MOJO_CHECK(false);
   }
@@ skipping 69 matching lines @@
     Environment::InstantiateDefaultRunLoop();
 
   MOJO_CHECK(g_application_request.is_pending());
   MOJO_CHECK(g_shell);
 
   // New applications are constructed for each test to avoid persisting state.
   application_impl_ = new ApplicationImpl(GetApplicationDelegate(),
                                           g_application_request.Pass());
 
   // Fake application initialization with the given command line arguments.
-  application_impl_->Initialize(g_shell.Pass(), g_args.Clone());
+  application_impl_->Initialize(g_shell.Pass(), g_args.Clone(), "");
 }
 
 void ApplicationTestBase::TearDown() {
   MOJO_CHECK(!g_application_request.is_pending());
   MOJO_CHECK(!g_shell);
 
   application_impl_->UnbindConnections(&g_application_request, &g_shell);
   delete application_impl_;
   if (ShouldCreateDefaultRunLoop())
     Environment::DestroyDefaultRunLoop();
 }
 
 bool ApplicationTestBase::ShouldCreateDefaultRunLoop() {
   return true;
 }
 
 }  // namespace test
 }  // namespace mojo