Allow cert-popup for WebView guests.

chrome/browser/ui/views/profiles/profile_chooser_view.cc

Index: chrome/browser/ui/views/profiles/profile_chooser_view.cc
diff --git a/chrome/browser/ui/views/profiles/profile_chooser_view.cc b/chrome/browser/ui/views/profiles/profile_chooser_view.cc
index d1945be97a86dc5fc214a8f77426e6823344af9e..e414b6a239019aa9af8095ddc8938002318261a9 100644
--- a/chrome/browser/ui/views/profiles/profile_chooser_view.cc
+++ b/chrome/browser/ui/views/profiles/profile_chooser_view.cc
@@ -38,6 +38,7 @@
 #include "components/signin/core/browser/signin_error_controller.h"
 #include "components/signin/core/browser/signin_manager.h"
 #include "components/signin/core/common/profile_management_switches.h"
+#include "components/web_modal/web_contents_modal_dialog_manager.h"
 #include "content/public/browser/render_widget_host_view.h"
 #include "grit/theme_resources.h"
 #include "third_party/skia/include/core/SkColor.h"
@@ -1537,6 +1538,9 @@ views::View* ProfileChooserView::CreateGaiaSigninView(
   views::WebView* web_view = new views::WebView(profile);
   web_view->LoadInitialURL(url);
   web_view->GetWebContents()->SetDelegate(this);
+  web_modal::WebContentsModalDialogManager::CreateForWebContents(
+      web_view->GetWebContents());
+
   web_view->SetPreferredSize(
       gfx::Size(kFixedGaiaViewWidth, kFixedGaiaViewHeight));
   content::RenderWidgetHostView* rwhv =