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

services/navigation/public/cpp/view.h

 // Copyright 2016 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 SERVICES_NAVIGATION_PUBLIC_CPP_VIEW_H_
 #define SERVICES_NAVIGATION_PUBLIC_CPP_VIEW_H_
 
 #include "base/observer_list.h"
 #include "base/strings/string16.h"
 #include "mojo/public/cpp/bindings/binding.h"
@@ skipping 56 matching lines @@
   void HideInterstitial();
 
   // Embed the View visually within |parent|.
   void EmbedInWindow(ui::Window* parent);
 
  private:
   // mojom::ViewClient:
   void OpenURL(mojom::OpenURLParamsPtr params) override;
   void LoadingStateChanged(bool is_loading) override;
   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 view,
                    mojom::ViewClientRequest request,
                    bool is_popup,
                    const gfx::Rect& initial_bounds,
                    bool user_gesture) override;
   void Close() override;
@@ skipping 17 matching lines @@
   bool can_go_forward_ = false;
 
   mojom::NavigationEntryPtr pending_navigation_;
   std::vector<mojom::NavigationEntryPtr> navigation_list_;
   int navigation_list_cursor_ = 0;
 };
 
 }  // namespace navigation
 
 #endif  // SERVICES_NAVIGATION_PUBLIC_CPP_VIEW_H_