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

content/browser/frame_host/navigation_entry_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/navigation_entry_impl.h"
 
 #include "base/metrics/histogram.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "content/browser/frame_host/navigation_controller_impl.h"
@@ skipping 429 matching lines @@
   int current_history_list_length = controller->GetEntryCount();
   if (should_clear_history_list()) {
     // Set the history list related parameters to the same values a
     // NavigationController would return before its first navigation. This will
     // fully clear the RenderView's view of the session history.
     pending_history_list_offset = -1;
     current_history_list_offset = -1;
     current_history_list_length = 0;
   }
   return HistoryNavigationParams(
-      GetPageState(), GetPageID(), pending_history_list_offset,
+      GetPageState(), GetPageID(), GetUniqueID(), pending_history_list_offset,
       current_history_list_offset, current_history_list_length,
       should_clear_history_list());
 }
 
 StartNavigationParams NavigationEntryImpl::ConstructStartNavigationParams()
     const {
   std::vector<unsigned char> browser_initiated_post_data;
   if (GetBrowserInitiatedPostData()) {
     browser_initiated_post_data.assign(
         GetBrowserInitiatedPostData()->front(),
         GetBrowserInitiatedPostData()->front() +
             GetBrowserInitiatedPostData()->size());
   }
 
   return StartNavigationParams(
       GetHasPostData(), extra_headers(), browser_initiated_post_data,
       should_replace_entry(), transferred_global_request_id().child_id,
       transferred_global_request_id().request_id);
 }
 
 }  // namespace content