Move redirect_chain from NavigationEntry to FrameNavigationEntry.

components/sessions/content/content_serialized_navigation_builder.cc

Index: components/sessions/content/content_serialized_navigation_builder.cc
diff --git a/components/sessions/content/content_serialized_navigation_builder.cc b/components/sessions/content/content_serialized_navigation_builder.cc
index 59df5cc2d016730fa5a64ff1c9875b12ad3cd696..66a284940e8d9299464484d1944456f26bf6cf0c 100644
--- a/components/sessions/content/content_serialized_navigation_builder.cc
+++ b/components/sessions/content/content_serialized_navigation_builder.cc
@@ -39,7 +39,7 @@ ContentSerializedNavigationBuilder::FromNavigationEntry(
   if (entry.GetFavicon().valid)
     navigation.favicon_url_ = entry.GetFavicon().url;
   navigation.http_status_code_ = entry.GetHttpStatusCode();
-  navigation.redirect_chain_ = entry.GetRedirectChain();
+  navigation.redirect_chain_ = entry.GetMainFrameRedirectChain();
   navigation.password_state_ = GetPasswordStateFromNavigation(entry);
 
   return navigation;
@@ -76,7 +76,7 @@ ContentSerializedNavigationBuilder::ToNavigationEntry(
   entry->SetTimestamp(navigation->timestamp_);
   entry->SetExtraData(kSearchTermsKey, navigation->search_terms_);
   entry->SetHttpStatusCode(navigation->http_status_code_);
-  entry->SetRedirectChain(navigation->redirect_chain_);
+  entry->SetMainFrameRedirectChain(navigation->redirect_chain_);
 
   // These fields should have default values.
   DCHECK_EQ(SerializedNavigationEntry::STATE_INVALID,