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

content/common/frame_messages.h

Index: content/common/frame_messages.h
diff --git a/content/common/frame_messages.h b/content/common/frame_messages.h
index 0f2f6e6c074d6b83572a703b8e3b05f5cbb88c6d..5271e4e191c55ffc62063bf46bcfbe81b10731b8 100644
--- a/content/common/frame_messages.h
+++ b/content/common/frame_messages.h
@@ -124,6 +124,7 @@ IPC_STRUCT_END()
 
 IPC_STRUCT_TRAITS_BEGIN(content::FrameNavigateParams)
   IPC_STRUCT_TRAITS_MEMBER(page_id)
+  IPC_STRUCT_TRAITS_MEMBER(nav_entry_id)
   IPC_STRUCT_TRAITS_MEMBER(url)
   IPC_STRUCT_TRAITS_MEMBER(base_url)
   IPC_STRUCT_TRAITS_MEMBER(referrer)
@@ -142,6 +143,15 @@ IPC_STRUCT_BEGIN_WITH_PARENT(FrameHostMsg_DidCommitProvisionalLoad_Params,
                              content::FrameNavigateParams)
   IPC_STRUCT_TRAITS_PARENT(content::FrameNavigateParams)
 
+  // This is the value from the browser (copied from the navigation request)
+  // indicating whether it intended to make a new entry. 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.
+  IPC_STRUCT_MEMBER(bool, intended_as_new_entry)
+
+  // Whether this commit created a new entry.
+  IPC_STRUCT_MEMBER(bool, did_create_new_entry)
+
   // Information regarding the security of the connection (empty if the
   // connection was not secure).
   IPC_STRUCT_MEMBER(std::string, security_info)
@@ -273,6 +283,8 @@ IPC_STRUCT_TRAITS_BEGIN(content::RequestNavigationParams)
   IPC_STRUCT_TRAITS_MEMBER(request_time)
   IPC_STRUCT_TRAITS_MEMBER(page_state)
   IPC_STRUCT_TRAITS_MEMBER(page_id)
+  IPC_STRUCT_TRAITS_MEMBER(nav_entry_id)
+  IPC_STRUCT_TRAITS_MEMBER(intended_as_new_entry)
   IPC_STRUCT_TRAITS_MEMBER(pending_history_list_offset)
   IPC_STRUCT_TRAITS_MEMBER(current_history_list_offset)
   IPC_STRUCT_TRAITS_MEMBER(current_history_list_length)