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

content/common/navigation_params.h

Index: content/common/navigation_params.h
diff --git a/content/common/navigation_params.h b/content/common/navigation_params.h
index ce34bcc04bdf1d7f7bab3adab382715c5587b28f..501d8f9b0ad0283cc442eba2f3e9348ad369edb7 100644
--- a/content/common/navigation_params.h
+++ b/content/common/navigation_params.h
@@ -170,6 +170,8 @@ struct CONTENT_EXPORT RequestNavigationParams {
                           base::Time request_time,
                           const PageState& page_state,
                           int32 page_id,
+                          int nav_entry_id,
+                          bool intended_as_new_entry,
                           int pending_history_list_offset,
                           int current_history_list_offset,
                           int current_history_list_length,
@@ -207,6 +209,18 @@ struct CONTENT_EXPORT RequestNavigationParams {
   // FrameHostMsg_DidCommitProvisionalLoad message.
   int32 page_id;
 
+  // For browser-initiated navigations, this is the unique id of the
+  // NavigationEntry being navigated to. (For renderer-initiated navigations it
+  // is 0.) If the load succeeds, then this nav_entry_id will be reflected in
+  // the resulting FrameHostMsg_DidCommitProvisionalLoad message.
+  int nav_entry_id;
+
+  // For browser-initiated navigations, this is true if this is a new entry
+  // being navigated to. This is false otherwise. TODO(avi): Remove this when
+  // the pending entry situation is made sane and the browser keeps them around
+  // long enough to match them via nav_entry_id, above.
+  bool intended_as_new_entry;
+
   // For history navigations, this is the offset in the history list of the
   // pending load. For non-history navigations, this will be ignored.
   int pending_history_list_offset;