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

content/browser/frame_host/navigator_impl.cc

 // Copyright 2013 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 "content/browser/frame_host/navigator_impl.h"
 
 #include "base/command_line.h"
 #include "base/metrics/histogram.h"
 #include "base/time/time.h"
 #include "content/browser/frame_host/frame_tree.h"
@@ skipping 310 matching lines @@
         navigation_start, entry.GetURL(), entry.restore_type()));
     // Create the navigation parameters.
     // TODO(vitalybuka): Move this before AboutToNavigateRenderFrame once
     // http://crbug.com/408684 is fixed.
     FrameMsg_Navigate_Type::Value navigation_type =
         GetNavigationType(controller_->GetBrowserContext(), entry, reload_type);
     dest_render_frame_host->Navigate(
         entry.ConstructCommonNavigationParams(navigation_type),
         entry.ConstructStartNavigationParams(),
         entry.ConstructRequestNavigationParams(
-            navigation_start, controller_->GetIndexOfEntry(&entry),
+            navigation_start,
+            controller_->GetPendingEntryIndex() == -1,
+            controller_->GetIndexOfEntry(&entry),
             controller_->GetLastCommittedEntryIndex(),
             controller_->GetEntryCount()));
   } else {
     // No need to navigate again.  Just resume the deferred request.
     dest_render_frame_host->GetProcess()->ResumeDeferredNavigation(
         entry.transferred_global_request_id());
   }
 
   // Make sure no code called via RFH::Navigate clears the pending entry.
   CHECK_EQ(controller_->GetPendingEntry(), &entry);
@@ skipping 552 matching lines @@
         "Navigation.TimeToCommit_ExistingRenderer_BeforeUnloadDiscounted",
         time_to_commit);
     UMA_HISTOGRAM_TIMES(
         "Navigation.TimeToURLJobStart_ExistingRenderer_BeforeUnloadDiscounted",
         time_to_network);
   }
   navigation_data_.reset();
 }
 
 }  // namespace content