Add is_srcdoc to FrameNavigationEntry and restore about::srcdoc URL.

content/browser/frame_host/navigation_controller_impl.cc

Index: content/browser/frame_host/navigation_controller_impl.cc
diff --git a/content/browser/frame_host/navigation_controller_impl.cc b/content/browser/frame_host/navigation_controller_impl.cc
index 69e9fd3862c1f9e060a9edb7e7ee75b8b06a3a98..58f6fc5fe8a9867b9ee764bb210763369488974a 100644
--- a/content/browser/frame_host/navigation_controller_impl.cc
+++ b/content/browser/frame_host/navigation_controller_impl.cc
@@ -712,7 +712,7 @@ void NavigationControllerImpl::LoadURLWithParams(const LoadURLParams& params) {
             node, -1, -1, nullptr,
             static_cast<SiteInstanceImpl*>(params.source_site_instance.get()),
             params.url, params.referrer, params.redirect_chain, PageState(),
-            "GET", -1);
+            "GET", -1, false);
       }
     }
   }
@@ -1074,7 +1074,8 @@ void NavigationControllerImpl::RendererDidNavigateToNewPage(
     FrameNavigationEntry* frame_entry = new FrameNavigationEntry(
         params.frame_unique_name, params.item_sequence_number,
         params.document_sequence_number, rfh->GetSiteInstance(), nullptr,
-        params.url, params.referrer, params.method, params.post_id);
+        params.url, params.referrer, params.method, params.post_id,
+        params.is_srcdoc);
     new_entry = GetLastCommittedEntry()->CloneAndReplace(
         frame_entry, true, rfh->frame_tree_node(),
         delegate_->GetFrameTree()->root());
@@ -1234,7 +1235,7 @@ void NavigationControllerImpl::RendererDidNavigateToExistingPage(
       rfh->frame_tree_node(), params.item_sequence_number,
       params.document_sequence_number, rfh->GetSiteInstance(), nullptr,
       params.url, params.referrer, params.redirects, params.page_state,
-      params.method, params.post_id);
+      params.method, params.post_id, params.is_srcdoc);
 
   // The redirected to page should not inherit the favicon from the previous
   // page.
@@ -1295,7 +1296,7 @@ void NavigationControllerImpl::RendererDidNavigateToSamePage(
       rfh->frame_tree_node(), params.item_sequence_number,
       params.document_sequence_number, rfh->GetSiteInstance(), nullptr,
       params.url, params.referrer, params.redirects, params.page_state,
-      params.method, params.post_id);
+      params.method, params.post_id, params.is_srcdoc);
 
   DiscardNonCommittedEntries();
 }
@@ -1321,7 +1322,8 @@ void NavigationControllerImpl::RendererDidNavigateNewSubframe(
     scoped_refptr<FrameNavigationEntry> frame_entry(new FrameNavigationEntry(
         params.frame_unique_name, params.item_sequence_number,
         params.document_sequence_number, rfh->GetSiteInstance(), nullptr,
-        params.url, params.referrer, params.method, params.post_id));
+        params.url, params.referrer, params.method, params.post_id,
+        params.is_srcdoc));
     new_entry = GetLastCommittedEntry()->CloneAndReplace(
         frame_entry.get(), is_in_page, rfh->frame_tree_node(),
         delegate_->GetFrameTree()->root());
@@ -1393,7 +1395,7 @@ bool NavigationControllerImpl::RendererDidNavigateAutoSubframe(
         rfh->frame_tree_node(), params.item_sequence_number,
         params.document_sequence_number, rfh->GetSiteInstance(), nullptr,
         params.url, params.referrer, params.redirects, params.page_state,
-        params.method, params.post_id);
+        params.method, params.post_id, params.is_srcdoc);
   }
 
   return send_commit_notification;