Use a direct include of strings headers in chrome/common/, part 1.

chrome/common/extensions/features/feature.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 "chrome/common/extensions/features/feature.h"
 
 #include <map>
 
 #include "base/command_line.h"
 #include "base/lazy_instance.h"
-#include "base/stringprintf.h"
-#include "base/string_util.h"
+#include "base/strings/string_util.h"
+#include "base/strings/stringprintf.h"
 #include "chrome/common/chrome_switches.h"
 
 using chrome::VersionInfo;
 
 namespace {
 
 const VersionInfo::Channel kDefaultChannel = VersionInfo::CHANNEL_STABLE;
 VersionInfo::Channel g_current_channel = kDefaultChannel;
 
 }  // namespace
@@ skipping 36 matching lines @@
 Feature::Availability Feature::CreateAvailability(AvailabilityResult result,
                                                   const std::string& message) {
   return Availability(result, message);
 }
 
 Feature::Feature() {}
 
 Feature::~Feature() {}
 
 }  // namespace extensions