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

chrome/browser/extensions/extension_bookmarks_module.cc

Index: chrome/browser/extensions/extension_bookmarks_module.cc
diff --git a/chrome/browser/extensions/extension_bookmarks_module.cc b/chrome/browser/extensions/extension_bookmarks_module.cc
index 9f978ef40d6b22d34080ef00423729bfd96863c3..2d7cbb3a431c03a5d277b2152f35f9cee21ad6c0 100644
--- a/chrome/browser/extensions/extension_bookmarks_module.cc
+++ b/chrome/browser/extensions/extension_bookmarks_module.cc
@@ -154,8 +154,10 @@ void ExtensionBookmarkEventRouter::Observe(BookmarkModel* model) {
 void ExtensionBookmarkEventRouter::DispatchEvent(Profile *profile,
                                                  const char* event_name,
                                                  const std::string json_args) {
-  ExtensionMessageService::GetInstance(profile->GetRequestContext())->
-      DispatchEventToRenderers(event_name, json_args);
+  if (profile->GetExtensionMessageService()) {
+    profile->GetExtensionMessageService()->
+        DispatchEventToRenderers(event_name, json_args);
+  }
 }
 
 void ExtensionBookmarkEventRouter::Loaded(BookmarkModel* model) {