(Reland) 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 63dccd33d3b9c64ab4484e7ffe9a8567bb80db69..231f650180ea26566063e4690c1b177f74e5ba57 100644
--- a/chrome/browser/ui/search/search_tab_helper_unittest.cc
+++ b/chrome/browser/ui/search/search_tab_helper_unittest.cc
@@ -322,8 +322,7 @@ class TabTitleObserver : public content::WebContentsObserver {
   void DidStartProvisionalLoadForFrame(
       content::RenderFrameHost* /* render_frame_host */,
       const GURL& /* validated_url */,
-      bool /* is_error_page */,
-      bool /* is_iframe_srcdoc */) override {
+      bool /* is_error_page */) override {
     title_on_start_ = web_contents()->GetTitle();
   }