re-use WebUIs

chrome/browser/ui/webui/net_internals/net_internals_ui.cc

Index: chrome/browser/ui/webui/net_internals/net_internals_ui.cc
diff --git a/chrome/browser/ui/webui/net_internals/net_internals_ui.cc b/chrome/browser/ui/webui/net_internals/net_internals_ui.cc
index f3092971c5afa76127d36e249ac9eb8889963bd3..324bf0707b0a67e23775ea23ca3d8ccd0523770f 100644
--- a/chrome/browser/ui/webui/net_internals/net_internals_ui.cc
+++ b/chrome/browser/ui/webui/net_internals/net_internals_ui.cc
@@ -839,14 +839,15 @@ void NetInternalsMessageHandler::IOThreadImpl::OnWebUIDeleted() {
 void NetInternalsMessageHandler::IOThreadImpl::OnRendererReady(
     const ListValue* list) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
-  DCHECK(!net_log()) << "notifyReady called twice";
 
   SendJavascriptCommand("receivedConstants",
                         NetInternalsUI::GetConstants());
 
-  // Register with network stack to observe events.
-  io_thread_->net_log()->AddThreadSafeObserver(this,
-                                               net::NetLog::LOG_ALL_BUT_BYTES);
+  if (!net_log()) {
+    // Register with network stack to observe events.
+    io_thread_->net_log()->AddThreadSafeObserver(this,
+        net::NetLog::LOG_ALL_BUT_BYTES);
+  }
 }
 
 void NetInternalsMessageHandler::IOThreadImpl::OnGetProxySettings(