Remove about:srcdoc url conversion.

blimp/engine/session/page_load_tracker.h

 // Copyright 2016 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.
 
 #ifndef BLIMP_ENGINE_SESSION_PAGE_LOAD_TRACKER_H_
 #define BLIMP_ENGINE_SESSION_PAGE_LOAD_TRACKER_H_
 
 #include "base/containers/small_map.h"
 #include "base/macros.h"
 #include "content/public/browser/render_frame_host.h"
@@ skipping 39 matching lines @@
     bool Loaded() const;
   };
 
   typedef base::SmallMap<std::map<content::RenderWidgetHost*, LoadStatus>>
       RenderWidgetLoadStatusMap;
 
   // content::WebContentsObserver implementation.
   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;
   void DidFinishLoad(content::RenderFrameHost* render_frame_host,
                      const GURL& validated_url) override;
   void DidFailLoad(content::RenderFrameHost* render_frame_host,
                    const GURL& validated_url,
                    int error_code,
                    const base::string16& error_description,
                    bool was_ignored_by_handler) override;
   void DidFirstPaintAfterLoad(
       content::RenderWidgetHost* render_widget_host) override;
 
   RenderWidgetLoadStatusMap render_widget_load_status_;
 
   PageLoadTrackerClient* client_;
 
   DISALLOW_COPY_AND_ASSIGN(PageLoadTracker);
 };
 
 }  // namespace engine
 }  // namespace blimp
 
 #endif  // BLIMP_ENGINE_SESSION_PAGE_LOAD_TRACKER_H_