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

chrome/browser/prefs/proxy_policy_unittest.cc

Index: chrome/browser/prefs/proxy_policy_unittest.cc
diff --git a/chrome/browser/prefs/proxy_policy_unittest.cc b/chrome/browser/prefs/proxy_policy_unittest.cc
index e7963abce6c057239cbcde3c436872d997884170..cfd6c465752808dc473fb2f2969465025e6604bd 100644
--- a/chrome/browser/prefs/proxy_policy_unittest.cc
+++ b/chrome/browser/prefs/proxy_policy_unittest.cc
@@ -15,6 +15,7 @@
 #include "components/policy/core/common/mock_configuration_policy_provider.h"
 #include "components/policy/core/common/policy_map.h"
 #include "components/policy/core/common/policy_service_impl.h"
+#include "components/policy/core/common/policy_types.h"
 #include "components/pref_registry/pref_registry_syncable.h"
 #include "components/proxy_config/proxy_config_dictionary.h"
 #include "components/proxy_config/proxy_config_pref_names.h"
@@ -121,15 +122,17 @@ TEST_F(ProxyPolicyTest, OverridesCommandLineOptions) {
       new base::StringValue(ProxyPrefs::kFixedServersProxyModeName);
   PolicyMap policy;
   policy.Set(key::kProxyMode, POLICY_LEVEL_MANDATORY, POLICY_SCOPE_USER,
-             mode_name, NULL);
+             POLICY_SOURCE_CLOUD, mode_name, nullptr);
   policy.Set(key::kProxyBypassList,
              POLICY_LEVEL_MANDATORY,
              POLICY_SCOPE_USER,
+             POLICY_SOURCE_CLOUD,
              new base::StringValue("abc"),
              NULL);
   policy.Set(key::kProxyServer,
              POLICY_LEVEL_MANDATORY,
              POLICY_SCOPE_USER,
+             POLICY_SOURCE_CLOUD,
              new base::StringValue("ghi"),
              NULL);
   provider_.UpdateChromePolicy(policy);
@@ -162,7 +165,7 @@ TEST_F(ProxyPolicyTest, OverridesUnrelatedCommandLineOptions) {
       new base::StringValue(ProxyPrefs::kAutoDetectProxyModeName);
   PolicyMap policy;
   policy.Set(key::kProxyMode, POLICY_LEVEL_MANDATORY, POLICY_SCOPE_USER,
-             mode_name, NULL);
+             POLICY_SOURCE_CLOUD, mode_name, nullptr);
   provider_.UpdateChromePolicy(policy);
 
   // First verify that command-line options are set correctly when
@@ -190,7 +193,7 @@ TEST_F(ProxyPolicyTest, OverridesCommandLineNoProxy) {
       new base::StringValue(ProxyPrefs::kAutoDetectProxyModeName);
   PolicyMap policy;
   policy.Set(key::kProxyMode, POLICY_LEVEL_MANDATORY, POLICY_SCOPE_USER,
-             mode_name, NULL);
+             POLICY_SOURCE_CLOUD, mode_name, nullptr);
   provider_.UpdateChromePolicy(policy);
 
   // First verify that command-line options are set correctly when
@@ -214,7 +217,7 @@ TEST_F(ProxyPolicyTest, OverridesCommandLineAutoDetect) {
       new base::StringValue(ProxyPrefs::kDirectProxyModeName);
   PolicyMap policy;
   policy.Set(key::kProxyMode, POLICY_LEVEL_MANDATORY, POLICY_SCOPE_USER,
-             mode_name, NULL);
+             POLICY_SOURCE_CLOUD, mode_name, nullptr);
   provider_.UpdateChromePolicy(policy);
 
   // First verify that the auto-detect is set if there is no managed