Fix interstitials on OOPIF-based guests.

content/browser/frame_host/interstitial_page_impl.cc

 // Copyright 2013 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 "content/browser/frame_host/interstitial_page_impl.h"
 
 #include <utility>
 #include <vector>
 
 #include "base/bind.h"
@@ skipping 736 matching lines @@
     int32_t main_frame_route_id,
     int32_t main_frame_widget_route_id,
     const mojom::CreateNewWindowParams& params,
     SessionStorageNamespace* session_storage_namespace) {
   NOTREACHED() << "InterstitialPage does not support showing popups.";
 }
 
 void InterstitialPageImpl::SetFocusedFrame(FrameTreeNode* node,
                                            SiteInstance* source) {
   frame_tree_.SetFocusedFrame(node, source);
+
+  if (web_contents_) {
+    static_cast<WebContentsImpl*>(web_contents_)
+        ->SetAsFocusedWebContentsIfNecessary();
+  }
 }
 
 void InterstitialPageImpl::CreateNewWidget(int32_t render_process_id,
                                            int32_t route_id,
                                            blink::WebPopupType popup_type) {
   NOTREACHED() << "InterstitialPage does not support showing drop-downs.";
 }
 
 void InterstitialPageImpl::CreateNewFullscreenWidget(int32_t render_process_id,
                                                      int32_t route_id) {
@@ skipping 203 matching lines @@
 
 void InterstitialPageImpl::UpdateDeviceScaleFactor(double device_scale_factor) {
   WebContentsImpl* web_contents_impl =
       static_cast<WebContentsImpl*>(web_contents_);
   if (!web_contents_impl)
     return;
 
   web_contents_impl->UpdateDeviceScaleFactor(device_scale_factor);
 }
 
+RenderWidgetHostInputEventRouter* InterstitialPageImpl::GetInputEventRouter() {
+  WebContentsImpl* web_contents_impl =
+      static_cast<WebContentsImpl*>(web_contents_);
+  if (!web_contents_impl)
+    return nullptr;
+
+  return web_contents_impl->GetInputEventRouter();
+}
+
 }  // namespace content