Check that all RenderProcessHost(s) are terminated.

content/browser/renderer_host/render_process_host_impl.h

Index: content/browser/renderer_host/render_process_host_impl.h
diff --git a/content/browser/renderer_host/render_process_host_impl.h b/content/browser/renderer_host/render_process_host_impl.h
index 6a74b4efbe5c4670a9c89ee13e08981c50bbf62d..9b239e3e7c53c3f06ec78e6c532cb1ef4207ae20 100644
--- a/content/browser/renderer_host/render_process_host_impl.h
+++ b/content/browser/renderer_host/render_process_host_impl.h
@@ -204,6 +204,9 @@ class CONTENT_EXPORT RenderProcessHostImpl
   static void RegisterHost(int host_id, RenderProcessHost* host);
   static void UnregisterHost(int host_id);
 
+  // Returns true if HasConnection() is true for any registered hosts.
+  static bool HasAnyConnection();
+
   // Implementation of FilterURL below that can be shared with the mock class.
   static void FilterURL(RenderProcessHost* rph, bool empty_allowed, GURL* url);