Use a direct include of strings headers in chrome/browser/a*-c*/.

chrome/browser/browser_about_handler.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/browser/browser_about_handler.h"
 
 #include <algorithm>
 #include <string>
 
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/memory/singleton.h"
-#include "base/string_util.h"
+#include "base/strings/string_util.h"
 #include "chrome/browser/net/url_fixer_upper.h"
 #include "chrome/browser/ui/browser_dialogs.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/url_constants.h"
 
 namespace {
 
 // Add paths here to be included in chrome://chrome-urls (about:about).
 // These paths will also be suggested by BuiltinProvider.
 const char* const kPaths[] = {
@@ skipping 160 matching lines @@
 #endif  // OFFICIAL_BUILD
 
   return false;
 }
 
 std::vector<std::string> ChromePaths() {
   std::vector<std::string> paths(kPaths, kPaths + arraysize(kPaths));
   std::sort(paths.begin(), paths.end());
   return paths;
 }