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

chrome/app/breakpad_linux.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.
 
 // For linux_syscall_support.h. This makes it safe to call embedded system
 // calls when in seccomp mode.
 
 #include "chrome/app/breakpad_linux.h"
 
 #include <fcntl.h>
@@ skipping 13 matching lines @@
 
 #include "base/command_line.h"
 #include "base/debug/crash_logging.h"
 #include "base/files/file_path.h"
 #include "base/linux_util.h"
 #include "base/path_service.h"
 #include "base/platform_file.h"
 #include "base/posix/eintr_wrapper.h"
 #include "base/posix/global_descriptors.h"
 #include "base/process_util.h"
-#include "base/string_util.h"
+#include "base/strings/string_util.h"
 #include "breakpad/src/client/linux/handler/exception_handler.h"
 #include "breakpad/src/client/linux/minidump_writer/directory_reader.h"
 #include "breakpad/src/common/linux/linux_libc_support.h"
 #include "breakpad/src/common/memory.h"
 #include "chrome/app/breakpad_linux_impl.h"
 #include "chrome/browser/crash_upload_list.h"
 #include "chrome/common/child_process_logging.h"
 #include "chrome/common/chrome_paths.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/chrome_version_info_posix.h"
@@ skipping 1479 matching lines @@
     } else {
       EnableNonBrowserCrashDumping(minidump_fd);
     }
   }
 }
 #endif  // OS_ANDROID
 
 bool IsCrashReporterEnabled() {
   return g_is_crash_reporter_enabled;
 }