Allow cert-popup for WebView guests.

chrome/browser/ui/views/certificate_selector.cc

Index: chrome/browser/ui/views/certificate_selector.cc
diff --git a/chrome/browser/ui/views/certificate_selector.cc b/chrome/browser/ui/views/certificate_selector.cc
index d2d5afb7efdd76ad6fb720c4fa4def035e56206c..1e353735c37072040e2ba579bf9d786ad1b99041 100644
--- a/chrome/browser/ui/views/certificate_selector.cc
+++ b/chrome/browser/ui/views/certificate_selector.cc
@@ -13,6 +13,8 @@
 #include "chrome/browser/certificate_viewer.h"
 #include "chrome/grit/generated_resources.h"
 #include "components/constrained_window/constrained_window_views.h"
+#include "components/guest_view/browser/guest_view_base.h"
+#include "components/web_modal/web_contents_modal_dialog_manager.h"
 #include "content/public/browser/web_contents.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/models/table_model.h"
@@ -87,6 +89,15 @@ CertificateSelector::~CertificateSelector() {
   table_->SetModel(nullptr);
 }
 
+// static
+bool CertificateSelector::CanShow(content::WebContents* web_contents) {
+  // GetTopLevelWebContents returns |web_contents| if it is not a guest.
+  content::WebContents* top_level_web_contents =
+      guest_view::GuestViewBase::GetTopLevelWebContents(web_contents);
+  return web_modal::WebContentsModalDialogManager::FromWebContents(
+             top_level_web_contents) != nullptr;
+}
+
 void CertificateSelector::Show() {
   constrained_window::ShowWebModalDialogViews(this, web_contents_);