Add navigation client lib for convenience

mash/browser/browser.cc

 // 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.
 
 #include "mash/browser/browser.h"
 
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "base/message_loop/message_loop.h"
 #include "base/strings/string16.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/timer/timer.h"
 #include "components/mus/public/cpp/window.h"
 #include "components/mus/public/cpp/window_tree_client.h"
 #include "mash/browser/debug_view.h"
 #include "mash/public/interfaces/launchable.mojom.h"
 #include "mojo/public/c/system/main.h"
+#include "services/navigation/public/cpp/view.h"
 #include "services/navigation/public/interfaces/view.mojom.h"
 #include "services/shell/public/cpp/application_runner.h"
 #include "services/shell/public/cpp/connector.h"
 #include "services/shell/public/cpp/shell_client.h"
 #include "services/tracing/public/cpp/tracing_impl.h"
 #include "ui/aura/mus/mus_util.h"
 #include "ui/gfx/canvas.h"
 #include "ui/gfx/paint_throbber.h"
 #include "ui/gfx/text_constants.h"
 #include "ui/native_theme/native_theme.h"
@@ skipping 79 matching lines @@
   base::TimeTicks start_time_;
   base::Timer timer_;
   base::WeakPtrFactory<Throbber> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(Throbber);
 };
 
 class UI : public views::WidgetDelegateView,
            public views::ButtonListener,
            public views::TextfieldController,
-           public navigation::mojom::ViewClient {
+           public navigation::ViewDelegate {
  public:
   enum class Type { WINDOW, POPUP };
 
   UI(Browser* browser,
      Type type,
      navigation::mojom::ViewPtr view,
      navigation::mojom::ViewClientRequest request)
       : browser_(browser),
         type_(type),
         back_button_(new views::LabelButton(this, base::ASCIIToUTF16("Back"))),
@@ skipping 140 matching lines @@
     switch (key_event.key_code()) {
       case ui::VKEY_RETURN: {
         view_->NavigateTo(GURL(prompt_->text()));
       } break;
       default:
         break;
     }
     return false;
   }
 
-  // navigation::mojom::ViewClient:
+  // navigation::ViewDelegate:
   void LoadingStateChanged(bool is_loading) override {
-    is_loading_ = is_loading;
-    if (is_loading_) {
+    if (view_.is_loading()) {
       reload_button_->SetText(base::ASCIIToUTF16("Stop"));
       throbber_->Start();
     } else {
       reload_button_->SetText(base::ASCIIToUTF16("Reload"));
       throbber_->Stop();
       progress_bar_->SetProgress(0.f);
     }
   }
   void NavigationStateChanged(const GURL& url,
                               const mojo::String& title,
@@ skipping 116 matching lines @@
   AddWindow(window);
 }
 
 void Browser::Create(shell::Connection* connection,
                      mojom::LaunchableRequest request) {
   bindings_.AddBinding(this, std::move(request));
 }
 
 }  // namespace browser
 }  // namespace mash