Removes code using mus client lib

services/navigation/view_impl.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 "services/navigation/view_impl.h"
 
 #include "base/memory/ptr_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "content/public/browser/browser_context.h"
 #include "content/public/browser/interstitial_page.h"
 #include "content/public/browser/interstitial_page_delegate.h"
 #include "content/public/browser/navigation_controller.h"
 #include "content/public/browser/navigation_details.h"
 #include "content/public/browser/navigation_entry.h"
 #include "content/public/browser/notification_details.h"
 #include "content/public/browser/notification_source.h"
 #include "content/public/browser/notification_types.h"
 #include "content/public/browser/web_contents.h"
 #include "services/service_manager/public/cpp/connector.h"
 #include "ui/aura/mus/window_tree_client.h"
 #include "ui/aura/mus/window_tree_host_mus.h"
 #include "ui/views/controls/webview/webview.h"
-#include "ui/views/mus/native_widget_mus.h"
 #include "ui/views/widget/widget.h"
 #include "url/gurl.h"
 
 namespace navigation {
 namespace {
 
 class InterstitialPageDelegate : public content::InterstitialPageDelegate {
  public:
   explicit InterstitialPageDelegate(const std::string& html) : html_(html) {}
   ~InterstitialPageDelegate() override {}
@@ skipping 283 matching lines @@
 
 views::Widget* ViewImpl::GetWidget() {
   return web_view_->GetWidget();
 }
 
 const views::Widget* ViewImpl::GetWidget() const {
   return web_view_->GetWidget();
 }
 
 }  // navigation