PlzNavigate: implement CommitNavigation on the browser side

content/browser/frame_host/navigation_controller_impl.cc

Index: content/browser/frame_host/navigation_controller_impl.cc
diff --git a/content/browser/frame_host/navigation_controller_impl.cc b/content/browser/frame_host/navigation_controller_impl.cc
index c4f05fdc199d2560d08acd5ded513397d745ec17..709873aa23d5633922ef4060444d8efa6d6fdd3e 100644
--- a/content/browser/frame_host/navigation_controller_impl.cc
+++ b/content/browser/frame_host/navigation_controller_impl.cc
@@ -1735,6 +1735,25 @@ void NavigationControllerImpl::DiscardPendingEntry() {
   pending_entry_index_ = -1;
 }
 
+void NavigationControllerImpl::FillHistoryParametersForNavigationEntry(
+    const NavigationEntryImpl& entry,
+    int* pending_history_list_offset,
+    int* current_history_list_offset,
+    int* current_history_list_length) const {
+  if (entry.should_clear_history_list()) {
+    // Set the history list related parameters to the same values a
+    // NavigationController would return before its first navigation. This will
+    // fully clear the RenderView's view of the session history.
+    *pending_history_list_offset = -1;
+    *current_history_list_offset = -1;
+    *current_history_list_length = 0;
+  } else {
+    *pending_history_list_offset = GetIndexOfEntry(&entry);
+    *current_history_list_offset = GetLastCommittedEntryIndex();
+    *current_history_list_length = GetEntryCount();
+  }
+}
+
 void NavigationControllerImpl::DiscardTransientEntry() {
   if (transient_entry_index_ == -1)
     return;