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

mojo/public/cpp/application/lib/application_impl.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_impl.h"
 
 #include "mojo/public/cpp/application/application_delegate.h"
 #include "mojo/public/cpp/application/lib/service_registry.h"
 #include "mojo/public/cpp/bindings/interface_ptr.h"
 #include "mojo/public/cpp/environment/logging.h"
@@ skipping 53 matching lines @@
   internal::ServiceRegistry* registry = new internal::ServiceRegistry(
       this, application_url, remote_services.Pass(), local_request.Pass());
   if (!delegate_->ConfigureOutgoingConnection(registry)) {
     delete registry;
     return nullptr;
   }
   outgoing_service_registries_.push_back(registry);
   return registry;
 }
 
-void ApplicationImpl::Initialize(ShellPtr shell, Array<String> args) {
+void ApplicationImpl::Initialize(ShellPtr shell,
+                                 Array<String> args,
+                                 const mojo::String& url) {
   shell_ = shell.Pass();
   shell_watch_ = new ShellPtrWatcher(this);
   shell_.set_error_handler(shell_watch_);
+  url_ = url;
   args_ = args.To<std::vector<std::string>>();
   delegate_->Initialize(this);
 }
 
 void ApplicationImpl::WaitForInitialize() {
   if (!shell_)
     binding_.WaitForIncomingMethodCall();
 }
 
 void ApplicationImpl::UnbindConnections(
@@ skipping 14 matching lines @@
     return;
   }
   incoming_service_registries_.push_back(registry);
 }
 
 void ApplicationImpl::RequestQuit() {
   Terminate();
 }
 
 }  // namespace mojo