net: Fix more clang warnings about missing virtual and OVERRIDE annotations.

net/base/net_util.cc

 // 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.
 
 #include "net/base/net_util.h"
 
 #include <algorithm>
 #include <iterator>
 #include <map>
 
@@ skipping 818 matching lines @@
 
 class HostComponentTransform : public AppendComponentTransform {
  public:
   explicit HostComponentTransform(const std::string& languages)
       : languages_(languages) {
   }
 
  private:
   virtual string16 Execute(
       const std::string& component_text,
-      std::vector<size_t>* offsets_into_component) const {
+      std::vector<size_t>* offsets_into_component) const OVERRIDE {
     return IDNToUnicodeWithOffsets(component_text, languages_,
                                    offsets_into_component);
   }
 
   const std::string& languages_;
 };
 
 class NonHostComponentTransform : public AppendComponentTransform {
  public:
   explicit NonHostComponentTransform(UnescapeRule::Type unescape_rules)
       : unescape_rules_(unescape_rules) {
   }
 
  private:
   virtual string16 Execute(
       const std::string& component_text,
-      std::vector<size_t>* offsets_into_component) const {
+      std::vector<size_t>* offsets_into_component) const OVERRIDE {
     return (unescape_rules_ == UnescapeRule::NONE) ?
         UTF8ToUTF16AndAdjustOffsets(component_text, offsets_into_component) :
         UnescapeAndDecodeUTF8URLComponentWithOffsets(component_text,
             unescape_rules_, offsets_into_component);
   }
 
   const UnescapeRule::Type unescape_rules_;
 };
 
 void AppendFormattedComponent(const std::string& spec,
@@ skipping 1521 matching lines @@
 
 NetworkInterface::NetworkInterface(const std::string& name,
                                    const IPAddressNumber& address)
     : name(name), address(address) {
 }
 
 NetworkInterface::~NetworkInterface() {
 }
 
 }  // namespace net