Update {virtual,override} to follow C++11 style in components.

components/policy/core/common/cloud/policy_builder.h

 // Copyright (c) 2012 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.
 
 #ifndef COMPONENTS_POLICY_CORE_COMMON_CLOUD_POLICY_BUILDER_H_
 #define COMPONENTS_POLICY_CORE_COMMON_CLOUD_POLICY_BUILDER_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 103 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(PolicyBuilder);
 };
 
 // Type-parameterized PolicyBuilder extension that allows for building policy
 // blobs carrying protobuf payloads.
 template<typename PayloadProto>
 class TypedPolicyBuilder : public PolicyBuilder {
  public:
   TypedPolicyBuilder();
-  virtual ~TypedPolicyBuilder() {}
+  ~TypedPolicyBuilder() override {}
 
   // Returns a reference to the payload protobuf being built.
   PayloadProto& payload() {
     if (!payload_.get())
       payload_.reset(new PayloadProto());
     return *payload_;
   }
   void clear_payload() {
     payload_.reset();
   }
 
   // PolicyBuilder:
-  virtual void Build() override {
+  void Build() override {
     if (payload_.get())
       CHECK(payload_->SerializeToString(policy_data().mutable_policy_value()));
 
     PolicyBuilder::Build();
   }
 
  private:
   scoped_ptr<PayloadProto> payload_;
 
   DISALLOW_COPY_AND_ASSIGN(TypedPolicyBuilder);
 };
 
 typedef TypedPolicyBuilder<enterprise_management::CloudPolicySettings>
     UserPolicyBuilder;
 
 #if !defined(OS_ANDROID) && !defined(OS_IOS)
 typedef TypedPolicyBuilder<enterprise_management::ExternalPolicyData>
     ComponentPolicyBuilder;
 #endif
 
 }  // namespace policy
 
 #endif  // COMPONENTS_POLICY_CORE_COMMON_CLOUD_POLICY_BUILDER_H_