ChromeOS: Remove ProfileHelper::IsSigninProfile.

chrome/browser/chromeos/profiles/profile_helper.h

Index: chrome/browser/chromeos/profiles/profile_helper.h
diff --git a/chrome/browser/chromeos/profiles/profile_helper.h b/chrome/browser/chromeos/profiles/profile_helper.h
index 2d11609a53a232ad80921203bd728849810f3433..c6d60261eccd4d598d7b663b7d41f6b51c3e15e1 100644
--- a/chrome/browser/chromeos/profiles/profile_helper.h
+++ b/chrome/browser/chromeos/profiles/profile_helper.h
@@ -51,11 +51,6 @@ class ProfileHelper : public BrowsingDataRemover::Observer,
   // could not be extracted from |profile|.
   static std::string GetUserIdHashFromProfile(Profile* profile);
 
-  // Returns true if |profile| is the signin Profile. This can be used during
-  // construction of the signin Profile to determine if that Profile is the
-  // signin Profile.
-  static bool IsSigninProfile(Profile* profile);
-
   // Initialize a bunch of services that are tied to a browser profile.
   // TODO(dzhioev): Investigate whether or not this method is needed.
   void ProfileStartup(Profile* profile, bool process_startup);