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

components/policy/core/common/policy_types.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef COMPONENTS_POLICY_CORE_COMMON_POLICY_TYPES_H_
 #define COMPONENTS_POLICY_CORE_COMMON_POLICY_TYPES_H_
 
 namespace policy {
 
 // The scope of a policy flags whether it is meant to be applied to the current
@@ skipping 10 matching lines @@
 // override it or not. The values are listed in increasing order of priority.
 enum PolicyLevel {
   // RECOMMENDED policies can be overridden by users. They are meant as a
   // default value configured by admins, that users can customize.
   POLICY_LEVEL_RECOMMENDED,
 
   // MANDATORY policies must be enforced and users can't circumvent them.
   POLICY_LEVEL_MANDATORY,
 };
 
+// The source of a policy indicates where its value is originating from. The
+// sources are ordered by priority (with weakest policy first).
+enum PolicySource {
+  // The policy was set because we are running in an enterprise environment.
+  POLICY_SOURCE_ENTERPRISE_DEFAULT,
+
+  // The policy was set by a cloud source.
+  POLICY_SOURCE_CLOUD,
+
+  // Any non-platform policy was overridden because we are running in an
+  // enterprise environment.
+  POLICY_SOURCE_ENTERPRISE_OVERRIDE,
+
+  // The policy was set by a platform source.
+  POLICY_SOURCE_PLATFORM,
+
+  // Number of source types. Has to be the last element.
+  POLICY_SOURCE_COUNT
+};
+
 }  // namespace policy
 
 #endif  // COMPONENTS_POLICY_CORE_COMMON_POLICY_TYPES_H_