Add source column to chrome://policy showing the origins of policies.

components/policy/core/common/policy_types.h

Index: components/policy/core/common/policy_types.h
diff --git a/components/policy/core/common/policy_types.h b/components/policy/core/common/policy_types.h
index 07289ca3ba04690360a82ab1752e3fa2ae86bb75..2b41047bbfc297eaa348735e4c5a875997b354b7 100644
--- a/components/policy/core/common/policy_types.h
+++ b/components/policy/core/common/policy_types.h
@@ -28,6 +28,28 @@ enum PolicyLevel {
   POLICY_LEVEL_MANDATORY,
 };
 
+// The source of a policy indicates where its value is originating from.
+enum PolicySource {
+  // The default value of a policy source.
+  POLICY_SOURCE_UNKNOWN,
+
+  // If the policy's default was determined by enterprise default settings.

[bartfab (slow), 2015/09/14 14:42:27]

Policies do not have defaults. They either are set or not.

[fhorschig, 2015/09/16 13:52:05]

Removed in the comment. The enum value should still be named ENTERPRISE_DEFAULT
as it's a key in the policy_templates.json.

+  POLICY_SOURCE_ENTERPRISE_DEFAULT,
+
+  // If the policy was programmatically set to an unchangeable value (e.g.
+  // to enforce ash tray visibility in public sessions).
+  POLICY_SOURCE_PROGRAMMATIC,

[bartfab (slow), 2015/09/14 14:42:27]

How about something like BUILT_IN instead?

[fhorschig, 2015/09/16 13:52:05]

Good! We've been struggling with a good name.

+
+  // If the policy is set by a platform source.
+  POLICY_SOURCE_PLATFORM,
+
+  // If the policy originates from a cloud source.

[bartfab (slow), 2015/09/14 14:42:27]

Nit: Unlike German, English actually appreciates repetitiveness. If you write
"is set by" and then "originates from" next, you are implying that there are
semantics hiding in the change of terms. In your case, the semantics should be
identical throughout. Please simplifying the comments to something more
repetitive, e.g.:

// Value automatically set by Chrome.
// Value set by platform policy.
// Value set by cloud policy.

[fhorschig, 2015/09/16 13:52:05]

Done.

+  POLICY_SOURCE_CLOUD,
+
+  // Number of source types. Has to be the last element.
+  POLICY_SOURCE_COUNT
+};
+
 }  // namespace policy
 
 #endif  // COMPONENTS_POLICY_CORE_COMMON_POLICY_TYPES_H_