This CL replaces e-mail with AccountId in easy signin code.

chrome/browser/chromeos/login/auth/chrome_login_performer.h

Index: chrome/browser/chromeos/login/auth/chrome_login_performer.h
diff --git a/chrome/browser/chromeos/login/auth/chrome_login_performer.h b/chrome/browser/chromeos/login/auth/chrome_login_performer.h
index a0b670c5ee68e3fc5e866cf90e1501d4e3b4e8a2..695805cb86f7296190590071244c396b6f2c5608 100644
--- a/chrome/browser/chromeos/login/auth/chrome_login_performer.h
+++ b/chrome/browser/chromeos/login/auth/chrome_login_performer.h
@@ -20,6 +20,8 @@
 #include "content/public/browser/notification_registrar.h"
 #include "google_apis/gaia/google_service_auth_error.h"
 
+class AccountId;
+
 namespace policy {
 class WildcardLoginChecker;
 }
@@ -33,14 +35,14 @@ class ChromeLoginPerformer : public LoginPerformer {
   explicit ChromeLoginPerformer(Delegate* delegate);
   ~ChromeLoginPerformer() override;
 
-  bool IsUserWhitelisted(const std::string& user_id,
+  bool IsUserWhitelisted(const AccountId& account_id,
                          bool* wildcard_match) override;
 
  protected:
   bool RunTrustedCheck(const base::Closure& callback) override;
   void DidRunTrustedCheck(const base::Closure& callback);
 
-  void RunOnlineWhitelistCheck(const std::string& user_id,
+  void RunOnlineWhitelistCheck(const AccountId& account_id,
                                bool wildcard_match,
                                const std::string& refresh_token,
                                const base::Closure& success_callback,
@@ -52,12 +54,12 @@ class ChromeLoginPerformer : public LoginPerformer {
 
   UserContext TransformSupervisedKey(const UserContext& context) override;
 
-  void SetupSupervisedUserFlow(const std::string& user_id) override;
+  void SetupSupervisedUserFlow(const AccountId& account_id) override;
 
-  void SetupEasyUnlockUserFlow(const std::string& user_id) override;
+  void SetupEasyUnlockUserFlow(const AccountId& account_id) override;
 
   scoped_refptr<Authenticator> CreateAuthenticator() override;
-  bool CheckPolicyForUser(const std::string& user_id) override;
+  bool CheckPolicyForUser(const AccountId& account_id) override;
   content::BrowserContext* GetSigninContext() override;
   net::URLRequestContextGetter* GetSigninRequestContext() override;