Send a subtree of same-process PageStates for back/forward child frames.

content/common/navigation_params.cc

Index: content/common/navigation_params.cc
diff --git a/content/common/navigation_params.cc b/content/common/navigation_params.cc
index 24078e67518416294d6d81eb225380f56e5427bc..425ae49b51bbd0d4f0a3d9d479b052b4ace8ebe5 100644
--- a/content/common/navigation_params.cc
+++ b/content/common/navigation_params.cc
@@ -146,7 +146,7 @@ RequestNavigationParams::RequestNavigationParams(
     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,
+    std::map<std::string, PageState> subtree_page_states,
     bool has_committed_real_load,
     bool intended_as_new_entry,
     int pending_history_list_offset,
@@ -161,7 +161,7 @@ RequestNavigationParams::RequestNavigationParams(
       nav_entry_id(nav_entry_id),
       is_same_document_history_load(is_same_document_history_load),
       is_history_navigation_in_new_child(is_history_navigation_in_new_child),
-      subframe_unique_names(subframe_unique_names),
+      subtree_page_states(subtree_page_states),
       has_committed_real_load(has_committed_real_load),
       intended_as_new_entry(intended_as_new_entry),
       pending_history_list_offset(pending_history_list_offset),