Use a direct include of strings headers in chrome/app/.

chrome/app/chrome_main_delegate.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/app/chrome_main_delegate.h"
 
 #include "base/command_line.h"
 #include "base/lazy_instance.h"
 #include "base/message_loop.h"
 #include "base/metrics/stats_counters.h"
 #include "base/path_service.h"
 #include "base/process_util.h"
-#include "base/stringprintf.h"
+#include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
 #include "build/build_config.h"
 #include "chrome/browser/chrome_content_browser_client.h"
 #include "chrome/browser/defaults.h"
 #include "chrome/browser/diagnostics/diagnostics_main.h"
 #include "chrome/browser/policy/policy_path_parser.h"
 #include "chrome/common/chrome_constants.h"
 #include "chrome/common/chrome_content_client.h"
 #include "chrome/common/chrome_paths.h"
 #include "chrome/common/chrome_paths_internal.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/chrome_version_info.h"
 #include "chrome/common/logging_chrome.h"
 #include "chrome/common/profiling.h"
 #include "chrome/common/startup_metric_utils.h"
 #include "chrome/common/url_constants.h"
 #include "chrome/plugin/chrome_content_plugin_client.h"
 #include "chrome/renderer/chrome_content_renderer_client.h"
 #include "chrome/utility/chrome_content_utility_client.h"
 #include "content/public/common/content_client.h"
 #include "content/public/common/content_paths.h"
 #include "ui/base/ui_base_switches.h"
 
 #if defined(OS_WIN)
 #include <algorithm>
 #include <atlbase.h>
 #include <malloc.h>
-#include "base/string_util.h"
+#include "base/strings/string_util.h"
 #include "sandbox/win/src/sandbox.h"
 #include "tools/memory_watcher/memory_watcher.h"
 #include "ui/base/resource/resource_bundle_win.h"
 #endif
 
 #if defined(OS_MACOSX)
 #include "base/mac/mac_util.h"
 #include "base/mac/os_crash_dumps.h"
 #include "chrome/app/breakpad_mac.h"
 #include "chrome/app/chrome_main_mac.h"
@@ skipping 661 matching lines @@
 
 content::ContentRendererClient*
     ChromeMainDelegate::CreateContentRendererClient() {
   return &g_chrome_content_renderer_client.Get();
 }
 
 content::ContentUtilityClient*
     ChromeMainDelegate::CreateContentUtilityClient() {
   return &g_chrome_content_utility_client.Get();
 }