Revert of Remove about:srcdoc url conversion.

content/test/web_contents_observer_sanity_checker.cc

 // Copyright 2014 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 "content/test/web_contents_observer_sanity_checker.h"
 
 #include "base/strings/stringprintf.h"
 #include "build/build_config.h"
 #include "content/browser/frame_host/render_frame_host_impl.h"
 #include "content/common/frame_messages.h"
@@ skipping 194 matching lines @@
 
   CHECK(!navigation_handle->HasCommitted() ||
         navigation_handle->GetRenderFrameHost() != nullptr);
 
   ongoing_navigations_.erase(navigation_handle);
 }
 
 void WebContentsObserverSanityChecker::DidStartProvisionalLoadForFrame(
     RenderFrameHost* render_frame_host,
     const GURL& validated_url,
-    bool is_error_page) {
+    bool is_error_page,
+    bool is_iframe_srcdoc) {
   AssertRenderFrameExists(render_frame_host);
 }
 
 void WebContentsObserverSanityChecker::DidCommitProvisionalLoadForFrame(
     RenderFrameHost* render_frame_host,
     const GURL& url,
     ui::PageTransition transition_type) {
   AssertRenderFrameExists(render_frame_host);
 }
 
@@ skipping 180 matching lines @@
       if (live_routes_.count(entry.first))
         return true;
       if (current_hosts_.count(entry.first))
         return true;
     }
   }
   return false;
 }
 
 }  // namespace content