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

chrome/browser/search/contextual_search_policy_handler_android_unittest.cc

 // Copyright 2014 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 "base/prefs/pref_value_map.h"
 #include "base/values.h"
 #include "chrome/browser/search/contextual_search_policy_handler_android.h"
 #include "chrome/common/pref_names.h"
 #include "components/policy/core/common/policy_map.h"
 #include "policy/policy_constants.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace policy {
 
 TEST(ContextualSearchPolicyHandlerAndroidTest, Default) {
   PolicyMap policy;
   PrefValueMap prefs;
   ContextualSearchPolicyHandlerAndroid handler;
   handler.ApplyPolicySettings(policy, &prefs);
   std::string pref_value;
   EXPECT_FALSE(prefs.GetString(prefs::kContextualSearchEnabled, &pref_value));
   EXPECT_EQ("", pref_value);
 }
 
 TEST(ContextualSearchPolicyHandlerAndroidTest, Enabled) {
   PolicyMap policy;
   policy.Set(key::kContextualSearchEnabled,
              POLICY_LEVEL_MANDATORY,
              POLICY_SCOPE_USER,
+             POLICY_SOURCE_PLATFORM,
              new base::FundamentalValue(true),
              NULL);
   PrefValueMap prefs;
   ContextualSearchPolicyHandlerAndroid handler;
   handler.ApplyPolicySettings(policy, &prefs);
 
   // Enabling Contextual Search policy should not set the pref.
   std::string pref_value;
   EXPECT_FALSE(prefs.GetString(prefs::kContextualSearchEnabled, &pref_value));
   EXPECT_EQ("", pref_value);
 }
 
 TEST(ContextualSearchPolicyHandlerAndroidTest, Disabled) {
   PolicyMap policy;
   policy.Set(key::kContextualSearchEnabled,
              POLICY_LEVEL_MANDATORY,
              POLICY_SCOPE_USER,
+             POLICY_SOURCE_PLATFORM,
              new base::FundamentalValue(false),
              NULL);
   PrefValueMap prefs;
   ContextualSearchPolicyHandlerAndroid handler;
   handler.ApplyPolicySettings(policy, &prefs);
 
   // Disabling Contextual Search should switch the pref to managed.
   std::string pref_value;
   EXPECT_TRUE(prefs.GetString(prefs::kContextualSearchEnabled, &pref_value));
   EXPECT_EQ("false", pref_value);
 }
 
 }  // namespace policy