Ensure that before creating proxy of site A, RVH of site A is initialized.

content/browser/frame_host/frame_tree.cc

Index: content/browser/frame_host/frame_tree.cc
diff --git a/content/browser/frame_host/frame_tree.cc b/content/browser/frame_host/frame_tree.cc
index 96890f09075d9e438e750271b3405f8ae3b2d80f..080506ca78514e6277cfe84a4fb4241f6c799f79 100644
--- a/content/browser/frame_host/frame_tree.cc
+++ b/content/browser/frame_host/frame_tree.cc
@@ -208,6 +208,9 @@ void FrameTree::CreateProxiesForSiteInstance(
       root()->render_manager()->CreateRenderFrame(
           site_instance, nullptr, MSG_ROUTING_NONE,
           CREATE_RF_SWAPPED_OUT | CREATE_RF_HIDDEN, nullptr);
+    } else if (!render_view_host->IsRenderViewLive()) {

[nasko, 2015/01/20 23:51:22]

Why not move this check inside the Ensure* method? It can return early if the RV
is already initialized. It will be unconditional call here and make code a bit
more readable.

[lazyboy, 2015/01/21 18:52:14]

Done.

+      root()->render_manager()->EnsureRenderViewInitialized(
+          source, render_view_host, site_instance);
     }
   }