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

content/browser/frame_host/navigation_request.cc

Index: content/browser/frame_host/navigation_request.cc
diff --git a/content/browser/frame_host/navigation_request.cc b/content/browser/frame_host/navigation_request.cc
index ead62611e39829cde6c54ff43a7f63d6736599bb..84b636465d708ef3d8f1cb9f817ee5bc353b7674 100644
--- a/content/browser/frame_host/navigation_request.cc
+++ b/content/browser/frame_host/navigation_request.cc
@@ -210,7 +210,7 @@ std::unique_ptr<NavigationRequest> NavigationRequest::CreateBrowserInitiated(
       entry.ConstructRequestNavigationParams(
           frame_entry, is_same_document_history_load,
           is_history_navigation_in_new_child,
-          entry.GetSubframeUniqueNames(frame_tree_node),
+          entry.GetSubtreePageStates(frame_tree_node),
           frame_tree_node->has_committed_real_load(),
           controller->GetPendingEntryIndex() == -1,
           controller->GetIndexOfEntry(&entry),
@@ -234,14 +234,14 @@ std::unique_ptr<NavigationRequest> NavigationRequest::CreateRendererInitiated(
   // renderer and sent to the browser instead of being measured here.
   // TODO(clamy): The pending history list offset should be properly set.
   RequestNavigationParams request_params(
-      false,                          // is_overriding_user_agent
-      std::vector<GURL>(),            // redirects
-      false,                          // can_load_local_resources
-      PageState(),                    // page_state
-      0,                              // nav_entry_id
-      false,                          // is_same_document_history_load
-      false,                          // is_history_navigation_in_new_child
-      std::map<std::string, bool>(),  // subframe_unique_names
+      false,                               // is_overriding_user_agent
+      std::vector<GURL>(),                 // redirects
+      false,                               // can_load_local_resources
+      PageState(),                         // page_state
+      0,                                   // nav_entry_id
+      false,                               // is_same_document_history_load
+      false,                               // is_history_navigation_in_new_child
+      std::map<std::string, PageState>(),  // subtree_page_states
       frame_tree_node->has_committed_real_load(),
       false,  // intended_as_new_entry
       -1,     // pending_history_list_offset