Revert of Remove about:srcdoc url conversion.

chrome/browser/ui/search/search_tab_helper_unittest.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 "chrome/browser/ui/search/search_tab_helper.h"
 
 #include <stdint.h>
 
 #include <memory>
 #include <string>
@@ skipping 304 matching lines @@
   explicit TabTitleObserver(content::WebContents* contents)
       : WebContentsObserver(contents) {}
 
   base::string16 title_on_start() { return title_on_start_; }
   base::string16 title_on_commit() { return title_on_commit_; }
 
  private:
   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();
   }
 
   void DidNavigateMainFrame(
       const content::LoadCommittedDetails& /* details */,
       const content::FrameNavigateParams& /* params */) override {
     title_on_commit_ = web_contents()->GetTitle();
   }
 
   base::string16 title_on_start_;
   base::string16 title_on_commit_;
 };
 
 TEST_F(SearchTabHelperTest, TitleIsSetForNTP) {
   TabTitleObserver title_observer(web_contents());
   NavigateAndCommit(GURL(chrome::kChromeUINewTabURL));
   const base::string16 title = l10n_util::GetStringUTF16(IDS_NEW_TAB_TITLE);
   EXPECT_EQ(title, title_observer.title_on_start());
   EXPECT_EQ(title, title_observer.title_on_commit());
   EXPECT_EQ(title, web_contents()->GetTitle());
 }