[cleanup] Removed embedded sign-in support code from OOBE.

ui/login/display_manager.js

Index: ui/login/display_manager.js
diff --git a/ui/login/display_manager.js b/ui/login/display_manager.js
index a914df9375e488777a6d2d8971c958379b34a77c..931305647c0a223fef415afd9244c4667adaf254 100644
--- a/ui/login/display_manager.js
+++ b/ui/login/display_manager.js
@@ -50,7 +50,6 @@
 /** @const */ var ACCELERATOR_APP_LAUNCH_BAILOUT = 'app_launch_bailout';
 /** @const */ var ACCELERATOR_APP_LAUNCH_NETWORK_CONFIG =
     'app_launch_network_config';
-/** @const */ var ACCELERATOR_EMBEDDED_SIGNIN = 'embedded_signin';
 /** @const */ var ACCELERATOR_NEW_OOBE = 'new_oobe';
 /** @const */ var ACCELERATOR_TOGGLE_WEBVIEW_SIGNIN = 'toggle_webview_signin';
 
@@ -403,9 +402,6 @@ cr.define('cr.ui.login', function() {
       } else if (name == ACCELERATOR_APP_LAUNCH_NETWORK_CONFIG) {
         if (currentStepId == SCREEN_APP_LAUNCH_SPLASH)
           chrome.send('networkConfigRequest');
-      } else if (name == ACCELERATOR_EMBEDDED_SIGNIN) {
-        if (currentStepId == SCREEN_GAIA_SIGNIN)
-          chrome.send('switchToEmbeddedSignin');
       } else if (name == ACCELERATOR_NEW_OOBE) {
         chrome.send('switchToNewOobe');
       } else if (name == ACCELERATOR_TOGGLE_WEBVIEW_SIGNIN) {