Take 2 at implementing activeTab.

chrome/browser/extensions/extension_toolbar_model.cc

Index: chrome/browser/extensions/extension_toolbar_model.cc
diff --git a/chrome/browser/extensions/extension_toolbar_model.cc b/chrome/browser/extensions/extension_toolbar_model.cc
index d8e0ed0efe6fac1d8a6c205b614a9d49b6e13074..cc6e647493205811434efed84b6ec3c6758d6bc1 100644
--- a/chrome/browser/extensions/extension_toolbar_model.cc
+++ b/chrome/browser/extensions/extension_toolbar_model.cc
@@ -7,6 +7,7 @@
 #include "chrome/browser/extensions/extension_browser_event_router.h"
 #include "chrome/browser/extensions/extension_prefs.h"
 #include "chrome/browser/extensions/extension_service.h"
+#include "chrome/browser/extensions/extension_tab_helper.h"
 #include "chrome/browser/extensions/extension_tab_util.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/profiles/profile.h"
@@ -95,6 +96,9 @@ ExtensionToolbarModel::Action ExtensionToolbarModel::ExecuteBrowserAction(
   if (tab_id < 0)
     return ACTION_NONE;
 
+  tab_contents->extension_tab_helper()->active_tab_permission_manager()->
+      GrantIfRequested(extension);
+
   ExtensionAction* browser_action = extension->browser_action();
   if (browser_action->HasPopup(tab_id)) {
     if (popup_url_out)