Remove about:srcdoc url conversion.

chrome/browser/tracing/navigation_tracing.cc

 // Copyright 2015 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/tracing/navigation_tracing.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 96 matching lines @@
             kNavigationTracingConfig);
   }
 }
 
 NavigationTracingObserver::~NavigationTracingObserver() {
 }
 
 void NavigationTracingObserver::DidStartProvisionalLoadForFrame(
     content::RenderFrameHost* render_frame_host,
     const GURL& validated_url,
-    bool is_error_page,
-    bool is_iframe_srcdoc) {
+    bool is_error_page) {
   if (!render_frame_host->GetParent() && !is_error_page) {
     content::BackgroundTracingManager::GetInstance()->TriggerNamedEvent(
         navigation_handle,
         content::BackgroundTracingManager::StartedFinalizingCallback());
   }
 }
 
 content::BackgroundTracingManager::TriggerHandle
     NavigationTracingObserver::navigation_handle = -1;
 
 }  // namespace tracing