(Reland) Remove about:srcdoc url conversion.

chrome/browser/extensions/api/web_navigation/web_navigation_api_helpers.cc

Index: chrome/browser/extensions/api/web_navigation/web_navigation_api_helpers.cc
diff --git a/chrome/browser/extensions/api/web_navigation/web_navigation_api_helpers.cc b/chrome/browser/extensions/api/web_navigation/web_navigation_api_helpers.cc
index 2cdcaa6f1c2df20c947360521eb56dfc54069fcc..ac74ce13664972421c5f89ae5e23cf827a96b023 100644
--- a/chrome/browser/extensions/api/web_navigation/web_navigation_api_helpers.cc
+++ b/chrome/browser/extensions/api/web_navigation/web_navigation_api_helpers.cc
@@ -66,8 +66,6 @@ void DispatchEvent(content::BrowserContext* browser_context,
 std::unique_ptr<Event> CreateOnBeforeNavigateEvent(
     content::NavigationHandle* navigation_handle) {
   GURL url(navigation_handle->GetURL());
-  if (navigation_handle->IsSrcdoc())
-    url = GURL(content::kAboutSrcDocURL);
 
   web_navigation::OnBeforeNavigate::Details details;
   details.tab_id =
@@ -105,9 +103,6 @@ void DispatchOnCommitted(events::HistogramValue histogram_value,
       navigation_handle->GetRenderFrameHost();
   ui::PageTransition transition_type = navigation_handle->GetPageTransition();
 
-  if (navigation_handle->IsSrcdoc())
-    url = GURL(content::kAboutSrcDocURL);
-
   std::unique_ptr<base::ListValue> args(new base::ListValue());
   std::unique_ptr<base::DictionaryValue> dict(new base::DictionaryValue());
   dict->SetInteger(keys::kTabIdKey, ExtensionTabUtil::GetTabId(web_contents));