policy: Remove UserCloudPolicyManagerFactory's dependency on Profile.

chrome/browser/signin/signin_manager_factory.h

Index: chrome/browser/signin/signin_manager_factory.h
diff --git a/chrome/browser/signin/signin_manager_factory.h b/chrome/browser/signin/signin_manager_factory.h
index 827840434cf2cd10e13f22d26caec28e524407ae..075d533dd3f3a6d40fb462e79dc6d38df5fd534a 100644
--- a/chrome/browser/signin/signin_manager_factory.h
+++ b/chrome/browser/signin/signin_manager_factory.h
@@ -25,15 +25,17 @@ class SigninManagerFactory : public BrowserContextKeyedServiceFactory {
   // SigninManager (for example, if |profile| is incognito).
   static SigninManagerBase* GetForProfile(Profile* profile);
 
-  // Returns the instance of SigninManager associated with this profile. Returns
-  // null if no SigninManager instance currently exists (will not create a new
-  // instance).
-  static SigninManagerBase* GetForProfileIfExists(Profile* profile);
+  // Returns the instance of SigninManager associated with this browser context.
+  // Returns null if no SigninManager instance currently exists (will not create
+  // a new instance).
+  static SigninManagerBase* GetForBrowserContextIfExists(
+      content::BrowserContext* context);
 #else
   // On non-ChromeOS platforms, the SigninManager the factory creates will be
   // an instance of the extended SigninManager class.
   static SigninManager* GetForProfile(Profile* profile);
-  static SigninManager* GetForProfileIfExists(Profile* profile);
+  static SigninManager* GetForBrowserContextIfExists(
+      content::BrowserContext* context);
 #endif
 
   // Returns an instance of the SigninManagerFactory singleton.