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

chrome/browser/net/disk_cache_dir_policy_handler_unittest.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 <string>
 
 #include "base/prefs/pref_value_map.h"
 #include "base/values.h"
 #include "chrome/browser/net/disk_cache_dir_policy_handler.h"
 #include "chrome/common/pref_names.h"
 #include "components/policy/core/common/policy_map.h"
+#include "components/policy/core/common/policy_types.h"
 #include "policy/policy_constants.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace policy {
 
 class DiskCacheDirPolicyTest : public testing::Test {
  protected:
   PolicyMap policy_;
   DiskCacheDirPolicyHandler handler_;
   PrefValueMap prefs_;
 };
 
 TEST_F(DiskCacheDirPolicyTest, Default) {
   handler_.ApplyPolicySettings(policy_, &prefs_);
   EXPECT_FALSE(prefs_.GetValue(prefs::kDiskCacheDir, NULL));
 }
 
 TEST_F(DiskCacheDirPolicyTest, SetPolicyInvalid) {
   // DiskCacheDir policy expects a string; give it a boolean.
   policy_.Set(key::kDiskCacheDir,
               POLICY_LEVEL_MANDATORY,
               POLICY_SCOPE_USER,
+              POLICY_SOURCE_CLOUD,
               new base::FundamentalValue(false),
               NULL);
   handler_.ApplyPolicySettings(policy_, &prefs_);
   EXPECT_FALSE(prefs_.GetValue(prefs::kDiskCacheDir, NULL));
 }
 
 TEST_F(DiskCacheDirPolicyTest, SetPolicyValid) {
   // Use a variable in the value. It should be expanded by the handler.
   const std::string in = "${user_name}/foo";
   policy_.Set(key::kDiskCacheDir,
               POLICY_LEVEL_MANDATORY,
               POLICY_SCOPE_USER,
+              POLICY_SOURCE_CLOUD,
               new base::StringValue(in),
               NULL);
   handler_.ApplyPolicySettings(policy_, &prefs_);
 
   const base::Value* value;
   ASSERT_TRUE(prefs_.GetValue(prefs::kDiskCacheDir, &value));
   std::string out;
   ASSERT_TRUE(value->GetAsString(&out));
   EXPECT_NE(std::string::npos, out.find("foo"));
   EXPECT_EQ(std::string::npos, out.find("${user_name}"));
 }
 
 }  // namespace policy