Changed the extension.connect() API not to broadcast to all tabs. Added a

chrome/browser/automation/automation_provider.cc

Index: chrome/browser/automation/automation_provider.cc
diff --git a/chrome/browser/automation/automation_provider.cc b/chrome/browser/automation/automation_provider.cc
index ed4fd467770978842f12ff5c8b352f6d3bfd1f45..1ce2c872c06840cf59a20802a7dc32e29b0c4ebb 100644
--- a/chrome/browser/automation/automation_provider.cc
+++ b/chrome/browser/automation/automation_provider.cc
@@ -2730,8 +2730,10 @@ bool AutomationProvider::InterceptBrowserEventMessageFromExternalHost(
     return false;
   }
 
-  ExtensionMessageService::GetInstance(profile()->GetRequestContext())->
-      DispatchEventToRenderers(event_name.c_str(), json_args);
+  if (profile()->GetExtensionMessageService()) {
+    profile()->GetExtensionMessageService()->
+        DispatchEventToRenderers(event_name.c_str(), json_args);
+  }
 
   return true;
 }