Add explicit base namespace to string16 users.

chrome/common/extensions/api/sockets/sockets_manifest_data.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/api/sockets/sockets_manifest_data.h"
 
 #include "chrome/common/extensions/api/sockets/sockets_manifest_permission.h"
 #include "extensions/common/manifest_constants.h"
 
 namespace extensions {
@@ skipping 20 matching lines @@
   const SocketsManifestData* data = SocketsManifestData::Get(extension);
   if (data)
     return data->permission()->CheckRequest(extension, request);
 
   return false;
 }
 
 // static
 scoped_ptr<SocketsManifestData> SocketsManifestData::FromValue(
     const base::Value& value,
-    string16* error) {
+    base::string16* error) {
   scoped_ptr<SocketsManifestPermission> permission =
       SocketsManifestPermission::FromValue(value, error);
   if (!permission)
     return scoped_ptr<SocketsManifestData>();
 
   return scoped_ptr<SocketsManifestData>(
       new SocketsManifestData(permission.Pass())).Pass();
 }
 
 }  // namespace extensions