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

components/policy/core/browser/android/policy_converter.cc

 // Copyright 2015 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/browser/android/policy_converter.h"
 
 #include <vector>
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_array.h"
@@ skipping 172 matching lines @@
 bool PolicyConverter::Register(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
 void PolicyConverter::SetPolicyValue(const std::string& key,
                                      scoped_ptr<base::Value> value) {
   const Schema schema = policy_schema_->GetKnownProperty(key);
   const PolicyNamespace ns(POLICY_DOMAIN_CHROME, std::string());
   policy_bundle_->Get(ns)
       .Set(key, POLICY_LEVEL_MANDATORY, POLICY_SCOPE_MACHINE,
+           POLICY_SOURCE_PLATFORM,
            ConvertValueToSchema(value.Pass(), schema).release(), nullptr);
 }
 
 }  // namespace android
 }  // namespace policy