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

chrome/browser/safe_browsing/malware_details_cache.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.
 //
 // Implementation of the MalwareDetails class.
 
 #include "chrome/browser/safe_browsing/malware_details.h"
 
 #include "base/bind.h"
 #include "base/lazy_instance.h"
 #include "base/md5.h"
-#include "base/string_util.h"
+#include "base/strings/string_util.h"
 #include "chrome/browser/net/chrome_url_request_context.h"
 #include "chrome/browser/safe_browsing/malware_details_cache.h"
 #include "chrome/browser/safe_browsing/report.pb.h"
 #include "chrome/browser/safe_browsing/safe_browsing_service.h"
 #include "content/public/browser/browser_thread.h"
 #include "net/base/host_port_pair.h"
 #include "net/base/load_flags.h"
 #include "net/base/net_errors.h"
 #include "net/http/http_response_headers.h"
 #include "net/url_request/url_fetcher.h"
@@ skipping 178 matching lines @@
       base::Bind(&MalwareDetailsCacheCollector::OpenEntry, this));
 }
 
 void MalwareDetailsCacheCollector::AllDone(bool success) {
   DVLOG(1) << "AllDone";
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
   *result_ = success;
   BrowserThread::PostTask(BrowserThread::IO, FROM_HERE, callback_);
   callback_.Reset();
 }