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 3c7548935305386e698276f855914210ecb6b46f..73f67f230e1bb9aea1903bda7e1b9a12a16aa33c 100644
--- a/content/browser/renderer_host/render_process_host_impl.h
+++ b/content/browser/renderer_host/render_process_host_impl.h
@@ -204,6 +204,10 @@ class CONTENT_EXPORT RenderProcessHostImpl
   static void RegisterHost(int host_id, RenderProcessHost* host);
   static void UnregisterHost(int host_id);
 
+  // CHECKs that all hosts have terminated.
+  // Added temporarily to diagnose crbug.com/608049.
+  static void CheckAllTerminated();
+
   // Implementation of FilterURL below that can be shared with the mock class.
   static void FilterURL(RenderProcessHost* rph, bool empty_allowed, GURL* url);