Eliminate BrowserProcess dependency from sign-in production code.

chrome/browser/signin/signin_manager.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. See SigninManagerBase for full description of
 // responsibilities. The class defined in this file provides functionality
 // required by all platforms except Chrome OS.
 //
 // When a user is signed in, a ClientLogin request is run on their behalf.
@@ skipping 101 matching lines @@
   // in-progress credentials to the new profile.
   virtual void CopyCredentialsFrom(const SigninManager& source);
 
   // Sign a user out, removing the preference, erasing all keys
   // associated with the user, and canceling all auth in progress.
   virtual void SignOut();
 
   // On platforms where SigninManager is responsible for dealing with
   // invalid username policy updates, we need to check this during
   // initialization and sign the user out.
-  virtual void Initialize(Profile* profile) OVERRIDE;
+  virtual void Initialize(Profile* profile, PrefService* local_state) OVERRIDE;
 
   // Invoked from an OAuthTokenFetchedCallback to complete user signin.
   virtual void CompletePendingSignin();
 
   // Returns true if there's a signin in progress.
   virtual bool AuthInProgress() const OVERRIDE;
 
   virtual bool IsSigninAllowed() const OVERRIDE;
 
   // Returns true if the passed username is allowed by policy. Virtual for
@@ skipping 164 matching lines @@
 
   // Helper object to listen for changes to the signin allowed preference.
   BooleanPrefMember signin_allowed_;
 
   DISALLOW_COPY_AND_ASSIGN(SigninManager);
 };
 
 #endif  // !defined(OS_CHROMEOS)
 
 #endif  // CHROME_BROWSER_SIGNIN_SIGNIN_MANAGER_H_