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 81e3229c2cc63743a5e30ecc332471e5409f0f91..3c8a64242ecc3f9e042ac543f9c387731b87906e 100644
--- a/content/common/navigation_params.h
+++ b/content/common/navigation_params.h
@@ -238,6 +238,7 @@ struct CONTENT_EXPORT RequestNavigationParams {
                           bool can_load_local_resources,
                           const PageState& page_state,
                           int nav_entry_id,
+                          bool is_same_document_fragment_change,
                           bool is_same_document_history_load,
                           bool is_history_navigation_in_new_child,
                           std::map<std::string, bool> subframe_unique_names,
@@ -275,6 +276,11 @@ struct CONTENT_EXPORT RequestNavigationParams {
   // the resulting FrameHostMsg_DidCommitProvisionalLoad message.
   int nav_entry_id;
 
+  // PlzNavigate
+  // Whether this navigation is differing only in the fragment compared to the
+  // current frame's URL. In that case, no network request should be made.
+  bool is_same_document_fragment_change;
+
   // For history navigations, this indicates whether the load will stay within
   // the same document.  Defaults to false.
   bool is_same_document_history_load;