Add cr_policy_indicator for settings controls

chrome/common/extensions/api/settings_private.idl

Index: chrome/common/extensions/api/settings_private.idl
diff --git a/chrome/common/extensions/api/settings_private.idl b/chrome/common/extensions/api/settings_private.idl
index 41e3b8faf2db5b9b4229dd5b709cf67cd13eb859..4654894c0ac1bfb156108a35278fec43c8eee704 100644
--- a/chrome/common/extensions/api/settings_private.idl
+++ b/chrome/common/extensions/api/settings_private.idl
@@ -8,10 +8,10 @@ namespace settingsPrivate {
   // Type of a pref.
   enum PrefType { BOOLEAN, NUMBER, STRING, URL, LIST };
 
-  // Policy source of a pref.
-  enum PolicySource { DEVICE, USER };
+  // Source of a restricted pref, either by policy or other source.

[michaelpg, 2015/08/27 23:40:01]

Source of a restricted pref (e.g., policy).

[stevenjb, 2015/08/28 23:18:08]

Hmm... I like it as-is.

+  enum PolicySource { DEVICE, USER, OWNER, PRIMARY_USER, EXTENSION };
 
-  // Policy enforcement of a pref.
+  // Enforcement type of a restricted pref.
   enum PolicyEnforcement { ENFORCED, RECOMMENDED };
 
   dictionary PrefObject {
@@ -31,6 +31,9 @@ namespace settingsPrivate {
     // The policy enforcement of the pref; must be specified if policySource is
     // also present.
     PolicyEnforcement? policyEnforcement;
+
+    // The recommended value if policyEnforcement == RECOMMENDED.
+    any? recommendedValue;
   };
 
   callback OnPrefSetCallback = void (boolean success);