net: Append base:: in the StringPrintf calls.

net/disk_cache/block_files.cc

 // Copyright (c) 2006-2008 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 "net/disk_cache/block_files.h"
 
 #include "base/file_util.h"
 #include "base/histogram.h"
 #include "base/string_util.h"
+#include "base/stringprintf.h"
 #include "base/thread_checker.h"
 #include "base/time.h"
 #include "net/disk_cache/cache_util.h"
 #include "net/disk_cache/file_lock.h"
 #include "net/disk_cache/trace.h"
 
 using base::TimeTicks;
 
 namespace {
 
@@ skipping 575 matching lines @@
       break;
     index = header->next_file;
   }
   if (max_blocks)
     *load = *used_count * 100 / max_blocks;
 }
 
 FilePath BlockFiles::Name(int index) {
   // The file format allows for 256 files.
   DCHECK(index < 256 || index >= 0);
-  std::string tmp = StringPrintf("%s%d", kBlockName, index);
+  std::string tmp = base::StringPrintf("%s%d", kBlockName, index);
   return path_.AppendASCII(tmp);
 }
 
 }  // namespace disk_cache