iwyu: Include stringprintf.h where appropriate, part 1.

webkit/plugins/npapi/plugin_list_posix.cc

 // Copyright (c) 2010 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 "webkit/plugins/npapi/plugin_list.h"
 
 #include "base/file_util.h"
 #include "base/path_service.h"
 #include "base/sha1.h"
+#include "base/stringprintf.h"
 #include "base/string_split.h"
 #include "base/string_util.h"
 #include "build/build_config.h"
 
 namespace webkit {
 namespace npapi {
 
 namespace {
 
 // We build up a list of files and mtimes so we can sort them.
@@ skipping 244 matching lines @@
 
   // TODO(evanm): prefer the newest version of flash, etc. here?
 
   VLOG_IF(1, PluginList::DebugPluginLoading()) << "Using " << info.path.value();
 
   return true;
 }
 
 }  // namespace npapi
 }  // namespace webkit