Remove experimental permission from infobars API and moving it to dev channel

chrome/test/webdriver/test/infobar_browser_action_extension/bg.js

Index: chrome/test/webdriver/test/infobar_browser_action_extension/bg.js
diff --git a/chrome/test/webdriver/test/infobar_browser_action_extension/bg.js b/chrome/test/webdriver/test/infobar_browser_action_extension/bg.js
index 9a2fa6202878f8726179086a4bfd02e7d3bcf819..5d29b54e45d8190f1d50010b597b236ecaf81418 100644
--- a/chrome/test/webdriver/test/infobar_browser_action_extension/bg.js
+++ b/chrome/test/webdriver/test/infobar_browser_action_extension/bg.js
@@ -11,7 +11,7 @@ function waitForInfobar(callback) {
 }
 
 chrome.tabs.getSelected(null, function(tab) {
-  chrome.experimental.infobars.show(
+  chrome.infobars.show(
       {'tabId': tab.id, 'path': 'view_checks.html'}, function() {
     g_infobarReady = true;
     if (g_callback)