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

components/policy/core/common/cloud/component_cloud_policy_updater_unittest.cc

 // Copyright (c) 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 "components/policy/core/common/cloud/component_cloud_policy_updater.h"
 
 #include "base/callback.h"
 #include "base/compiler_specific.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/sequenced_task_runner.h"
@@ skipping 93 matching lines @@
       dm_protocol::kChromeExtensionPolicyType);
   builder_.policy_data().set_settings_entity_id(kTestExtension);
   builder_.payload().set_download_url(kTestDownload);
   builder_.payload().set_secure_hash(crypto::SHA256HashString(kTestPolicy));
 
   PolicyNamespace ns(POLICY_DOMAIN_EXTENSIONS, kTestExtension);
   PolicyMap& policy = expected_bundle_.Get(ns);
   policy.Set("Name",
              POLICY_LEVEL_MANDATORY,
              POLICY_SCOPE_USER,
+             POLICY_SOURCE_CLOUD,
              new base::StringValue("disabled"),
              NULL);
   policy.Set("Second",
              POLICY_LEVEL_RECOMMENDED,
              POLICY_SCOPE_USER,
+             POLICY_SOURCE_CLOUD,
              new base::StringValue("maybe"),
              NULL);
 }
 
 void ComponentCloudPolicyUpdaterTest::TearDown() {
   updater_.reset();
   task_runner_->RunUntilIdle();
 }
 
 scoped_ptr<em::PolicyFetchResponse>
@@ skipping 218 matching lines @@
   // Now cancel that update before the download completes.
   EXPECT_CALL(store_delegate_, OnComponentCloudPolicyStoreUpdated()).Times(0);
   updater_->CancelUpdate(
       PolicyNamespace(POLICY_DOMAIN_EXTENSIONS, kTestExtension));
   task_runner_->RunUntilIdle();
   Mock::VerifyAndClearExpectations(&store_delegate_);
   EXPECT_FALSE(fetcher_factory_.GetFetcherByID(0));
 }
 
 }  // namespace policy