Revert of Remove about:srcdoc url conversion.

chrome/browser/ui/search/search_tab_helper_unittest.cc

Index: chrome/browser/ui/search/search_tab_helper_unittest.cc
diff --git a/chrome/browser/ui/search/search_tab_helper_unittest.cc b/chrome/browser/ui/search/search_tab_helper_unittest.cc
index 97118d7e8e2267a87528b0cb59eb4836f53c108e..bacf1d56b08abd2fc577a68236a7eaad82416394 100644
--- a/chrome/browser/ui/search/search_tab_helper_unittest.cc
+++ b/chrome/browser/ui/search/search_tab_helper_unittest.cc
@@ -322,7 +322,8 @@
   void DidStartProvisionalLoadForFrame(
       content::RenderFrameHost* /* render_frame_host */,
       const GURL& /* validated_url */,
-      bool /* is_error_page */) override {
+      bool /* is_error_page */,
+      bool /* is_iframe_srcdoc */) override {
     title_on_start_ = web_contents()->GetTitle();
   }