Move ownership of source SiteInstance to the FrameNavigationEntry.

content/browser/frame_host/navigator_impl.cc

Index: content/browser/frame_host/navigator_impl.cc
diff --git a/content/browser/frame_host/navigator_impl.cc b/content/browser/frame_host/navigator_impl.cc
index e9d4f7bb2c6742cc9dd855f703f50553376997a8..e7dc6a2a5ac7ac1e08cfafad19802c91d2e31e5a 100644
--- a/content/browser/frame_host/navigator_impl.cc
+++ b/content/browser/frame_host/navigator_impl.cc
@@ -773,19 +773,19 @@ void NavigatorImpl::RequestTransferURL(
     }
     // TODO(creis): Handle POST submissions.  See https://crbug.com/582211 and
     // https://crbug.com/101395.
-    entry->AddOrUpdateFrameEntry(node, -1, -1, nullptr, dest_url,
-                                 referrer_to_use, PageState(), "GET", -1);
+    entry->AddOrUpdateFrameEntry(
+        node, -1, -1, static_cast<SiteInstanceImpl*>(source_site_instance),
+        nullptr, dest_url, referrer_to_use, PageState(), "GET", -1);
   } else {
     // Main frame case.
     entry = NavigationEntryImpl::FromNavigationEntry(
         controller_->CreateNavigationEntry(
             dest_url, referrer_to_use, page_transition, is_renderer_initiated,
             std::string(), controller_->GetBrowserContext()));
+    entry->root_node()->frame_entry->set_source_site_instance(
+        static_cast<SiteInstanceImpl*>(source_site_instance));
   }
 
-  // The source_site_instance may matter for navigations via RenderFrameProxy.
-  entry->set_source_site_instance(
-      static_cast<SiteInstanceImpl*>(source_site_instance));
   entry->SetRedirectChain(redirect_chain);
   // Don't allow an entry replacement if there is no entry to replace.
   // http://crbug.com/457149