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

services/navigation/public/interfaces/view.mojom

 // 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.
 
 module navigation.mojom;
 
-import "components/mus/public/interfaces/window_tree.mojom";
-import "ui/mojo/geometry/geometry.mojom";
 import "url/mojo/url.mojom";
 
 interface ViewFactory {
   CreateView(ViewClient client, View& view);
 };
 
 interface ViewClient {
   LoadingStateChanged(bool is_loading);
-  NavigationStateChanged(url.mojom.Url url,
-                         string title,
-                         bool can_go_back,
-                         bool can_go_forward);
-  LoadProgressChanged(double progress);
-  ViewCreated(View view,
-              ViewClient& client,
-              bool is_popup,
-              mojo.Rect initial_rect,
-              bool user_gesture);
-  Close();
 };
 
 interface View {
-  // Navigates the view to |url|.
-  NavigateTo(url.mojom.Url url);
-
-  GoBack();
-  GoForward();
-  Reload(bool skip_cache);
-  Stop();
-
-  // Obtains a Mus WindowTreeClient for the View, so it can be embedded in a
-  // UI.
-  GetWindowTreeClient(mus.mojom.WindowTreeClient& client);
+  LoadUrl(url.mojom.Url url);
 };