Add explicit base namespace to string16 users.

chrome/common/extensions/manifest_handlers/app_isolation_info.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/manifest_handlers/app_isolation_info.h"
 
 #include "base/memory/scoped_ptr.h"
 #include "base/strings/string16.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 20 matching lines @@
       extension->GetManifestData(keys::kIsolation));
   return info ? info->has_isolated_storage : false;
 }
 
 AppIsolationHandler::AppIsolationHandler() {
 }
 
 AppIsolationHandler::~AppIsolationHandler() {
 }
 
-bool AppIsolationHandler::Parse(Extension* extension, string16* error) {
+bool AppIsolationHandler::Parse(Extension* extension, base::string16* error) {
   // Platform apps always get isolated storage.
   if (extension->is_platform_app()) {
     extension->SetManifestData(keys::kIsolation, new AppIsolationInfo(true));
     return true;
   }
 
   // Other apps only get it if it is requested _and_ experimental APIs are
   // enabled.
   if (!extension->is_app() ||
       !PermissionsData::GetInitialAPIPermissions(extension)->count(
@@ skipping 37 matching lines @@
 
 bool AppIsolationHandler::AlwaysParseForType(Manifest::Type type) const {
   return type == Manifest::TYPE_PLATFORM_APP;
 }
 
 const std::vector<std::string> AppIsolationHandler::Keys() const {
   return SingleKey(keys::kIsolation);
 }
 
 }  // namespace extensions