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

chrome/browser/chromeos/policy/login_profile_policy_provider.cc

 // 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.
 
 #include "chrome/browser/chromeos/policy/login_profile_policy_provider.h"
 
 #include <string>
 
 #include "base/bind.h"
 #include "base/callback.h"
@@ skipping 72 matching lines @@
   }
 }
 
 }  // namespace
 
 LoginProfilePolicyProvider::LoginProfilePolicyProvider(
     PolicyService* device_policy_service)
     : device_policy_service_(device_policy_service),
       waiting_for_device_policy_refresh_(false),
       weak_factory_(this) {
+  // All Chrome OS policies are coming from the cloud.
+  source_ = POLICY_SOURCE_CLOUD;
 }
 
 LoginProfilePolicyProvider::~LoginProfilePolicyProvider() {
 }
 
 void LoginProfilePolicyProvider::Init(SchemaRegistry* registry) {
   ConfigurationPolicyProvider::Init(registry);
   device_policy_service_->AddObserver(POLICY_DOMAIN_CHROME, this);
   if (device_policy_service_->IsInitializationComplete(POLICY_DOMAIN_CHROME))
     UpdateFromDevicePolicy();
@@ skipping 94 matching lines @@
       ApplyValueAsMandatoryPolicy(policy_value.get(),
                                   key::kPowerManagementIdleSettings,
                                   &user_policy_map);
     }
   }
 
   UpdatePolicy(bundle.Pass());
 }
 
 }  // namespace policy