Make sure bubbles in Views default to close before their RenderFrameHosts.

content/test/test_render_frame_host.cc

Index: content/test/test_render_frame_host.cc
diff --git a/content/test/test_render_frame_host.cc b/content/test/test_render_frame_host.cc
index 86944830c772f136d0177dd673d6e1c93b57a8e3..6c486045cfeee96b13729c86fbe1f01db84e7997 100644
--- a/content/test/test_render_frame_host.cc
+++ b/content/test/test_render_frame_host.cc
@@ -90,6 +90,10 @@ TestRenderFrameHost* TestRenderFrameHost::AppendChild(
       child_creation_observer_.last_created_frame());
 }
 
+void TestRenderFrameHost::Detach() {
+  OnDetach();
+}
+
 void TestRenderFrameHost::SimulateNavigationStart(const GURL& url) {
   if (IsBrowserSideNavigationEnabled()) {
     SendRendererInitiatedNavigationRequest(url, false);