Classify navigations without page id in parallel to the existing classifier.

content/browser/frame_host/navigation_request.cc

Index: content/browser/frame_host/navigation_request.cc
diff --git a/content/browser/frame_host/navigation_request.cc b/content/browser/frame_host/navigation_request.cc
index f46eecba30ff0f5b1d9a3d4f827d50c90949d76d..cd443ded992f399a6e0f57ff66bb5fa70799c328 100644
--- a/content/browser/frame_host/navigation_request.cc
+++ b/content/browser/frame_host/navigation_request.cc
@@ -90,7 +90,9 @@ scoped_ptr<NavigationRequest> NavigationRequest::CreateBrowserInitiated(
       BeginNavigationParams(method, headers.ToString(),
                             LoadFlagFromNavigationType(navigation_type), false),
       entry.ConstructRequestNavigationParams(
-          navigation_start, controller->GetIndexOfEntry(&entry),
+          navigation_start,
+          controller->GetPendingEntryIndex() == -1,
+          controller->GetIndexOfEntry(&entry),
           controller->GetLastCommittedEntryIndex(),
           controller->GetEntryCount()),
       request_body, true, &entry));