Add a basic browser to mash that uses the navigation service.

services/navigation/view_impl.h

Index: services/navigation/view_impl.h
diff --git a/services/navigation/view_impl.h b/services/navigation/view_impl.h
index e28281326ceaaa01fa6fceba54da4d1a5479a617..426185f7c9c9bad71a407478a5556da597c68af8 100644
--- a/services/navigation/view_impl.h
+++ b/services/navigation/view_impl.h
@@ -6,6 +6,7 @@
 #define SERVICES_NAVIGATION_VIEW_IMPL_H_
 
 #include "base/macros.h"
+#include "components/mus/public/cpp/window_tree_delegate.h"
 #include "content/public/browser/web_contents_delegate.h"
 #include "mojo/public/cpp/bindings/binding_set.h"
 #include "mojo/public/cpp/bindings/strong_binding.h"
@@ -13,13 +14,22 @@
 #include "services/shell/public/cpp/interface_factory.h"
 #include "services/shell/public/cpp/shell_client.h"
 #include "services/shell/public/cpp/shell_connection_ref.h"
+#include "ui/views/widget/widget_delegate.h"
+
+namespace views {
+class WebView;
+class Widget;
+}
 
 namespace navigation {
 
 class ViewImpl : public mojom::View,
-                 public content::WebContentsDelegate {
+                 public content::WebContentsDelegate,
+                 public mus::WindowTreeDelegate,
+                 public views::WidgetDelegate {
  public:
-  ViewImpl(content::BrowserContext* browser_context,
+  ViewImpl(shell::Connector* connector,
+           content::BrowserContext* browser_context,
            mojom::ViewClientPtr client,
            mojom::ViewRequest request,
            std::unique_ptr<shell::ShellConnectionRef> ref);
@@ -27,18 +37,50 @@ class ViewImpl : public mojom::View,
 
  private:
   // mojom::View:
-  void LoadUrl(const GURL& url) override;
+  void NavigateTo(const GURL& url) override;
+  void GoBack() override;
+  void GoForward() override;
+  void Reload(bool skip_cache) override;
+  void Stop() override;
+  void GetWindowTreeClient(
+      mus::mojom::WindowTreeClientRequest request) override;
 
   // content::WebContentsDelegate:
+  void AddNewContents(content::WebContents* source,
+                      content::WebContents* new_contents,
+                      WindowOpenDisposition disposition,
+                      const gfx::Rect& initial_rect,
+                      bool user_gesture,
+                      bool* was_blocked) override;
+  void CloseContents(content::WebContents* source) override;
   void LoadingStateChanged(content::WebContents* source,
                            bool to_different_document) override;
+  void NavigationStateChanged(content::WebContents* source,
+                              content::InvalidateTypes changed_flags) override;
+  void LoadProgressChanged(content::WebContents* source,
+                           double progress) override;
+
+  // mus::WindowTreeDelegate:
+  void OnEmbed(mus::Window* root) override;
+  void OnConnectionLost(mus::WindowTreeConnection* connection) override;
+  void OnEventObserved(const ui::Event& event, mus::Window* target) override;
+
+  // views::WidgetDelegate:
+  views::View* GetContentsView() override;
+  views::Widget* GetWidget() override;
+  const views::Widget* GetWidget() const override;
 
+  shell::Connector* connector_;
   mojo::StrongBinding<mojom::View> binding_;
   mojom::ViewClientPtr client_;
   std::unique_ptr<shell::ShellConnectionRef> ref_;
 
+  views::WebView* web_view_;
+
   std::unique_ptr<content::WebContents> web_contents_;
 
+  std::unique_ptr<views::Widget> widget_;
+
   DISALLOW_COPY_AND_ASSIGN(ViewImpl);
 };