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

chrome/test/testing_profile.h

Index: chrome/test/testing_profile.h
diff --git a/chrome/test/testing_profile.h b/chrome/test/testing_profile.h
index b360ac25a5715a8b054bbc5a4d8ac3c5a785e27d..b73ecd05c034baa36938b4f3e81d318a9f8d675a 100644
--- a/chrome/test/testing_profile.h
+++ b/chrome/test/testing_profile.h
@@ -87,6 +87,9 @@ class TestingProfile : public Profile {
   virtual ExtensionProcessManager* GetExtensionProcessManager() {
     return NULL;
   }
+  virtual ExtensionMessageService* GetExtensionMessageService() {
+    return NULL;
+  }
   virtual SSLHostState* GetSSLHostState() {
     return NULL;
   }