PlzNavigate: identify same-page browser-initiated navigation.

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 0cdafb53064c2f2b1a306b907ef826736d625420..c47da6b89c797ca8ceb40b93f578effdf10bbe92 100644
--- a/content/common/navigation_params.h
+++ b/content/common/navigation_params.h
@@ -231,7 +231,6 @@ struct CONTENT_EXPORT RequestNavigationParams {
                           bool can_load_local_resources,
                           const PageState& page_state,
                           int nav_entry_id,
-                          bool is_same_document_history_load,
                           bool is_history_navigation_in_new_child,
                           std::map<std::string, bool> subframe_unique_names,
                           bool has_committed_real_load,
@@ -268,10 +267,6 @@ struct CONTENT_EXPORT RequestNavigationParams {
   // the resulting FrameHostMsg_DidCommitProvisionalLoad message.
   int nav_entry_id;
 
-  // For history navigations, this indicates whether the load will stay within
-  // the same document.  Defaults to false.
-  bool is_same_document_history_load;
-
   // Whether this is a history navigation in a newly created child frame, in
   // which case the browser process is instructing the renderer process to load
   // a URL from a session history item.  Defaults to false.