Use a direct include of strings headers in chrome/common/, part 1.

chrome/common/extensions/manifest_handlers/nacl_modules_handler.cc

 // Copyright 2013 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 "chrome/common/extensions/manifest_handlers/nacl_modules_handler.h"
 
 #include "base/lazy_instance.h"
 #include "base/memory/scoped_ptr.h"
-#include "base/string_number_conversions.h"
+#include "base/strings/string_number_conversions.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/values.h"
 #include "chrome/common/extensions/extension_manifest_constants.h"
 #include "extensions/common/error_utils.h"
 
 namespace extensions {
 
 namespace keys = extension_manifest_keys;
 namespace errors = extension_manifest_errors;
 
@@ skipping 61 matching lines @@
 
   extension->SetManifestData(keys::kNaClModules, nacl_module_data.release());
   return true;
 }
 
 const std::vector<std::string> NaClModulesHandler::Keys() const {
   return SingleKey(keys::kNaClModules);
 }
 
 }  // namespace extensions