Use a direct include of strings headers in ppapi/, printing/.

ppapi/shared_impl/private/net_address_private_impl.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 "ppapi/shared_impl/private/net_address_private_impl.h"
 
 #if defined(OS_WIN)
 #include <windows.h>
 #include <winsock2.h>
 #include <ws2tcpip.h>
 #elif defined(OS_POSIX) && !defined(OS_NACL)
 #include <arpa/inet.h>
 #include <sys/socket.h>
 #include <sys/types.h>
 #endif
 
 #include <string.h>
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/logging.h"
-#include "base/stringprintf.h"
+#include "base/strings/stringprintf.h"
 #include "build/build_config.h"
 #include "ppapi/c/pp_var.h"
 #include "ppapi/c/private/ppb_net_address_private.h"
 #include "ppapi/shared_impl/proxy_lock.h"
 #include "ppapi/shared_impl/var.h"
 #include "ppapi/thunk/thunk.h"
 
 #if defined(OS_MACOSX)
 // This is a bit evil, but it's standard operating procedure for |s6_addr|....
 #define s6_addr16 __u6_addr.__u6_addr16
@@ skipping 545 matching lines @@
 
   COMPILE_ASSERT(sizeof(ipv6_addr->addr) == kIPv6AddressSize,
                  mismatched_IPv6_address_size);
   memcpy(ipv6_addr->addr, net_addr->address, kIPv6AddressSize);
 
   ipv6_addr->unused_padding = 0;
   return true;
 }
 
 }  // namespace ppapi