Add base:: to string16 in extensions/.

extensions/common/manifest_handlers/offline_enabled_info.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 "extensions/common/manifest_handlers/offline_enabled_info.h"
 
 #include "base/memory/scoped_ptr.h"
 #include "base/strings/string16.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 17 matching lines @@
       extension->GetManifestData(keys::kOfflineEnabled));
   return info ? info->offline_enabled : false;
 }
 
 OfflineEnabledHandler::OfflineEnabledHandler() {
 }
 
 OfflineEnabledHandler::~OfflineEnabledHandler() {
 }
 
-bool OfflineEnabledHandler::Parse(Extension* extension, string16* error) {
+bool OfflineEnabledHandler::Parse(Extension* extension, base::string16* error) {
   if (!extension->manifest()->HasKey(keys::kOfflineEnabled)) {
     // Only platform apps default to being enabled offline, and we should only
     // attempt parsing without a key present if it is a platform app.
     DCHECK(extension->is_platform_app());
     extension->SetManifestData(keys::kOfflineEnabled,
                                new OfflineEnabledInfo(true));
     return true;
   }
 
   bool offline_enabled = false;
@@ skipping 11 matching lines @@
 
 bool OfflineEnabledHandler::AlwaysParseForType(Manifest::Type type) const {
   return type == Manifest::TYPE_PLATFORM_APP;
 }
 
 const std::vector<std::string> OfflineEnabledHandler::Keys() const {
   return SingleKey(keys::kOfflineEnabled);
 }
 
 }  // namespace extensions