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

chrome/browser/policy/policy_network_browsertest.cc

Index: chrome/browser/policy/policy_network_browsertest.cc
diff --git a/chrome/browser/policy/policy_network_browsertest.cc b/chrome/browser/policy/policy_network_browsertest.cc
index e5c42af2e3fcabbbd7e668305eaf3f895f5a4a2e..ec2d90c8d493ad33308427b02e8b29ed124852b6 100644
--- a/chrome/browser/policy/policy_network_browsertest.cc
+++ b/chrome/browser/policy/policy_network_browsertest.cc
@@ -12,6 +12,7 @@
 #include "components/policy/core/browser/browser_policy_connector.h"
 #include "components/policy/core/common/mock_configuration_policy_provider.h"
 #include "components/policy/core/common/policy_map.h"
+#include "components/policy/core/common/policy_types.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/test/browser_test.h"
 #include "net/http/http_transaction_factory.h"
@@ -84,7 +85,7 @@ class QuicAllowedPolicyIsFalse: public QuicAllowedPolicyTestBase {
  protected:
   void GetQuicAllowedPolicy(PolicyMap* values) override {
     values->Set(key::kQuicAllowed, POLICY_LEVEL_MANDATORY, POLICY_SCOPE_MACHINE,
-        new base::FundamentalValue(false), NULL);
+        POLICY_SOURCE_CLOUD, new base::FundamentalValue(false), nullptr);
   }
 
  private:
@@ -103,7 +104,7 @@ class QuicAllowedPolicyIsTrue: public QuicAllowedPolicyTestBase {
  protected:
   void GetQuicAllowedPolicy(PolicyMap* values) override {
     values->Set(key::kQuicAllowed, POLICY_LEVEL_MANDATORY, POLICY_SCOPE_MACHINE,
-        new base::FundamentalValue(true), NULL);
+        POLICY_SOURCE_CLOUD, new base::FundamentalValue(true), nullptr);
   }
 
  private: