Add explicit base namespace to string16 users.

chrome/common/extensions/api/plugins/plugins_handler.cc

 // Copyright (c) 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/plugins/plugins_handler.h"
 
 #include "base/file_util.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/values.h"
@@ skipping 48 matching lines @@
 PluginsHandler::PluginsHandler() {
 }
 
 PluginsHandler::~PluginsHandler() {
 }
 
 const std::vector<std::string> PluginsHandler::Keys() const {
   return SingleKey(keys::kPlugins);
 }
 
-bool PluginsHandler::Parse(Extension* extension, string16* error) {
+bool PluginsHandler::Parse(Extension* extension, base::string16* error) {
   const base::ListValue* list_value = NULL;
   if (!extension->manifest()->GetList(keys::kPlugins, &list_value)) {
     *error = ASCIIToUTF16(manifest_errors::kInvalidPlugins);
     return false;
   }
 
   scoped_ptr<PluginManifestData> plugins_data(new PluginManifestData);
 
   for (size_t i = 0; i < list_value->GetSize(); ++i) {
     const base::DictionaryValue* plugin_value = NULL;
@@ skipping 61 matching lines @@
             IDS_EXTENSION_LOAD_PLUGIN_PATH_FAILED,
             plugin->path.LossyDisplayName());
       return false;
       }
     }
   }
   return true;
 }
 
 }  // namespace extensions