Use a direct include of strings headers in content/browser/, part 2.

content/browser/renderer_host/pepper/pepper_tcp_socket.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 "content/browser/renderer_host/pepper/pepper_tcp_socket.h"
 
 #include <string.h>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/compiler_specific.h"
 #include "base/logging.h"
-#include "base/string_util.h"
+#include "base/strings/string_util.h"
 #include "content/browser/renderer_host/pepper/pepper_message_filter.h"
 #include "content/public/browser/browser_thread.h"
 #include "net/base/host_port_pair.h"
 #include "net/base/io_buffer.h"
 #include "net/base/ip_endpoint.h"
 #include "net/base/net_errors.h"
 #include "net/cert/cert_verifier.h"
 #include "net/cert/x509_certificate.h"
 #include "net/dns/host_resolver.h"
 #include "net/dns/single_request_host_resolver.h"
@@ skipping 423 matching lines @@
 
   int result = socket_->Write(
       write_buffer_.get(),
       write_buffer_->BytesRemaining(),
       base::Bind(&PepperTCPSocket::OnWriteCompleted, base::Unretained(this)));
   if (result != net::ERR_IO_PENDING)
     OnWriteCompleted(result);
 }
 
 }  // namespace content