Fix detection of RenderViewHosts pending deletion in CreateRenderViewHost.

content/browser/frame_host/render_frame_host_manager.cc

Index: content/browser/frame_host/render_frame_host_manager.cc
diff --git a/content/browser/frame_host/render_frame_host_manager.cc b/content/browser/frame_host/render_frame_host_manager.cc
index 71ec817e8d78b47bf48cc58b0cf878138f5921cd..872b66eb74df7992a16cfcb8603f4ddc3c5c9464 100644
--- a/content/browser/frame_host/render_frame_host_manager.cc
+++ b/content/browser/frame_host/render_frame_host_manager.cc
@@ -903,6 +903,11 @@ void RenderFrameHostManager::DiscardUnusedFrame(
 
 void RenderFrameHostManager::MoveToPendingDeleteHosts(
     scoped_ptr<RenderFrameHostImpl> render_frame_host) {
+  // If this is the main frame going away, mark the corresponding
+  // RenderViewHost for deletion as well so that we don't try to reuse it.
+  if (render_frame_host->frame_tree_node()->IsMainFrame())
+    render_frame_host->render_view_host()->set_pending_deletion();
+
   // |render_frame_host| will be deleted when its SwapOut ACK is received, or
   // when the timer times out, or when the RFHM itself is deleted (whichever
   // comes first).