cros: Added a new function to quick unlock api for checking unfinished pins.

chrome/common/extensions/api/quick_unlock_private.idl

Index: chrome/common/extensions/api/quick_unlock_private.idl
diff --git a/chrome/common/extensions/api/quick_unlock_private.idl b/chrome/common/extensions/api/quick_unlock_private.idl
index c3121beffcaf4e61c5d7148737a66a8e72b6f317..29dd4fbee834963de1b7556e84d61dcd71996745 100644
--- a/chrome/common/extensions/api/quick_unlock_private.idl
+++ b/chrome/common/extensions/api/quick_unlock_private.idl
@@ -19,8 +19,35 @@ namespace quickUnlockPrivate {
     PIN
   };
 
+  // The problems a given PIN might have.
+  enum CredentialProblem {
+    TOO_SHORT,
+    TOO_LONG,
+    TOO_WEAK,
+    CONTAINS_NONDIGIT
+  };
+
+  dictionary CredentialCheck {
+    // The given PINs errors. Users cannot proceed with an error.
+    CredentialProblem[] errors;
+    // THe given PINs warnings. Users can, but are not advised to proceed with
+    // a warning.
+    CredentialProblem[] warnings;
+  };
+
+  dictionary CredentialRequirements {
+    // The minimum allowed length for a PIN.
+    long minLength;
+    // The maximum allowed length for a PIN. A value of 0 indicates no maximum
+    // length.
+    long maxLength;
+  };
+
   callback BooleanResultCallback = void (boolean value);
   callback ModesCallback = void (QuickUnlockMode[] modes);
+  callback CredentialCheckCallback = void (CredentialCheck check);
+  callback CredentialRequirementsCallback =
+      void (CredentialRequirements requirements);
 
   interface Functions {
     // Returns the set of quick unlock modes that are available for the user to
@@ -31,6 +58,23 @@ namespace quickUnlockPrivate {
     // the lock screen.
     static void getActiveModes(ModesCallback onComplete);
 
+    // Checks if the given credential can be used for the given unlock mode.
+    // Enterprise policy can change credential requirements.
+    // |mode|: The quick unlock mode that is used.
+    // |credential|: The given credential.
+    // |onComplete|: Called with a list of warnings and errors the given
+    //     |credential| has (or an empty list if there are none).
+    static void checkCredential(QuickUnlockMode mode,
+                                DOMString credential,
+                                CredentialCheckCallback onComplete);
+
+    // Gets the credential requirements for the given unlock mode.
+    // |mode|: The quick unlock mode that is used.
+    // |onComplete|: Called with the credential requirements of the given
+    //     |mode|.
+    static void getCredentialRequirements(
+        QuickUnlockMode mode, CredentialRequirementsCallback onComplete);
+
     // Update the set of quick unlock modes that are currently active/enabled.
     // |accountPassword|: The password associated with the account (e.g. the
     // GAIA password). This is required to change the quick unlock credentials.