Added interstitial page for merge session.

chrome/browser/chromeos/login/oauth_login_manager.h

Index: chrome/browser/chromeos/login/oauth_login_manager.h
diff --git a/chrome/browser/chromeos/login/oauth_login_manager.h b/chrome/browser/chromeos/login/oauth_login_manager.h
index bb55f5d753c63e211bb563cd39740427d3df153c..211d615274205360754fc1f5af04df1a8077bcfe 100644
--- a/chrome/browser/chromeos/login/oauth_login_manager.h
+++ b/chrome/browser/chromeos/login/oauth_login_manager.h
@@ -5,8 +5,6 @@
 #ifndef CHROME_BROWSER_CHROMEOS_LOGIN_OAUTH_LOGIN_MANAGER_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_OAUTH_LOGIN_MANAGER_H_
 
-#include <string>
-
 #include "base/memory/ref_counted.h"
 #include "net/url_request/url_request_context_getter.h"
 
@@ -32,6 +30,9 @@ class OAuthLoginManager {
    public:
     virtual ~Delegate() {}
 
+    // Raised when merge session is completed.
+    virtual void OnCompletedMergeSession() = 0;
+
     // Raised when cookie jar authentication is successfully completed.
     virtual void OnCompletedAuthentication(Profile* user_profile) = 0;