Check that all RenderProcessHost(s) are terminated.

content/browser/renderer_host/render_process_host_impl.cc

Index: content/browser/renderer_host/render_process_host_impl.cc
diff --git a/content/browser/renderer_host/render_process_host_impl.cc b/content/browser/renderer_host/render_process_host_impl.cc
index 86624eb5bbf6a85122a4850e98c9ef411ae6705c..a5b9f78d4cad69ad001455f2a122e0fa089dcd73 100644
--- a/content/browser/renderer_host/render_process_host_impl.cc
+++ b/content/browser/renderer_host/render_process_host_impl.cc
@@ -2103,6 +2103,16 @@ void RenderProcessHostImpl::UnregisterHost(int host_id) {
 }
 
 // static
+bool RenderProcessHostImpl::HasAnyConnection() {
+  iterator iter(AllHostsIterator());
+  while (!iter.IsAtEnd()) {
+    if (iter.GetCurrentValue()->HasConnection())
+      return true;
+  }
+  return false;
+}
+
+// static
 void RenderProcessHostImpl::FilterURL(RenderProcessHost* rph,
                                       bool empty_allowed,
                                       GURL* url) {