Introduce SigninManagerDelegate and use to eliminate CookieSettings dependency.

chrome/browser/signin/signin_manager_base.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
 // The signin manager encapsulates some functionality tracking
 // which user is signed in.
 //
 // **NOTE** on semantics of SigninManager:
 //
 // Once a signin is successful, the username becomes "established" and will not
@@ skipping 44 matching lines @@
 
 // Details for the Notification type NOTIFICATION_GOOGLE_SIGNED_OUT.
 struct GoogleServiceSignoutDetails {
   explicit GoogleServiceSignoutDetails(const std::string& in_username)
       : username(in_username) {}
   std::string username;
 };
 
 class SigninManagerBase : public ProfileKeyedService {
  public:
-  // Returns true if the cookie policy for the given profile allows cookies
-  // for the Google signin domain.
-  static bool AreSigninCookiesAllowed(Profile* profile);
-  static bool AreSigninCookiesAllowed(CookieSettings* cookie_settings);
-
   // Returns true if the username is allowed based on the policy string.
   static bool IsAllowedUsername(const std::string& username,
                                 const std::string& policy);
 
   SigninManagerBase();
   virtual ~SigninManagerBase();
 
   // If user was signed in, load tokens from DB if available.
   void Initialize(Profile* profile);
   bool IsInitialized() const;
@@ skipping 88 matching lines @@
   // The list of SigninDiagnosticObservers.
   ObserverList<signin_internals_util::SigninDiagnosticsObserver, true>
       signin_diagnostics_observers_;
 
   base::WeakPtrFactory<SigninManagerBase> weak_pointer_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(SigninManagerBase);
 };
 
 #endif  // CHROME_BROWSER_SIGNIN_SIGNIN_MANAGER_BASE_H_