cros: Added policies for screen unlock.

chrome/browser/chromeos/login/quick_unlock/pin_storage.h

Index: chrome/browser/chromeos/login/quick_unlock/pin_storage.h
diff --git a/chrome/browser/chromeos/login/quick_unlock/pin_storage.h b/chrome/browser/chromeos/login/quick_unlock/pin_storage.h
index f9fe72aadbecff1921e3716e0c1d82bf26680110..2037b3b7fd5193744ef3bd0829edff18ac39c564 100644
--- a/chrome/browser/chromeos/login/quick_unlock/pin_storage.h
+++ b/chrome/browser/chromeos/login/quick_unlock/pin_storage.h
@@ -23,9 +23,8 @@ namespace chromeos {
 
 class PinStorage : public KeyedService {
  public:
-  // TODO(jdufault): Pull these values in from policy. See crbug.com/612271.
+  // TODO(sammiequon): Pull this value in from policy. See crbug.com/612271.
   static const int kMaximumUnlockAttempts = 3;
-  static const base::TimeDelta kStrongAuthTimeout;
 
   // Registers profile prefs.
   static void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry);
@@ -39,6 +38,9 @@ class PinStorage : public KeyedService {
   void MarkStrongAuth();
   // Returns true if the user has been strongly authenticated.
   bool HasStrongAuth() const;
+  // Returns true if the user last strong authentication was longer than the set
+  // preference. This should not be called if HasStrongAuth returns false.
+  bool NeedsStrongAuth() const;
   // Returns the time since the last strong authentication. This should not be
   // called if HasStrongAuth returns false.
   base::TimeDelta TimeSinceLastStrongAuth() const;
@@ -56,6 +58,8 @@ class PinStorage : public KeyedService {
   void SetPin(const std::string& pin);
   // Removes the pin; IsPinSet will return false.
   void RemovePin();
+  // Checks the to see if pin unlock enabled.
+  bool IsPinUnlockEnabled() const;
 
   // Is PIN entry currently available?
   bool IsPinAuthenticationAvailable() const;