Mojo C++ bindings: switch services/navigation mojom target to use STL types.

services/navigation/navigation_unittest.cc

 // Copyright 2015 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 <memory>
 
 #include "base/macros.h"
 #include "base/run_loop.h"
 #include "mojo/public/cpp/bindings/binding.h"
 #include "services/navigation/public/interfaces/view.mojom.h"
@@ skipping 26 matching lines @@
 
  private:
   // mojom::ViewClient:
   void OpenURL(mojom::OpenURLParamsPtr params) override {}
   void LoadingStateChanged(bool is_loading) override {
     // Should see loading start, then stop.
     if (++load_count_ == 2 && loop_)
       loop_->Quit();
   }
   void NavigationStateChanged(const GURL& url,
-                              const mojo::String& title,
+                              const std::string& title,
                               bool can_go_back,
                               bool can_go_forward) override {}
   void LoadProgressChanged(double progress) override {}
   void UpdateHoverURL(const GURL& url) override {}
   void ViewCreated(mojom::ViewPtr,
                    mojom::ViewClientRequest,
                    bool,
                    const gfx::Rect&,
                    bool) override {}
   void Close() override {}
@@ skipping 21 matching lines @@
   mojom::ViewPtr view;
   view_factory->CreateView(GetViewClient(), GetProxy(&view));
   view->NavigateTo(GURL("about:blank"));
 
   base::RunLoop loop;
   QuitOnLoadingStateChange(&loop);
   loop.Run();
 }
 
 }  // namespace navigation