Add base:: to string16 in extensions/.

extensions/common/manifest_handlers/csp_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/csp_info.h"
 
 #include "base/memory/scoped_ptr.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/values.h"
@@ skipping 59 matching lines @@
       GetContentSecurityPolicy(extension);
 }
 
 CSPHandler::CSPHandler(bool is_platform_app)
     : is_platform_app_(is_platform_app) {
 }
 
 CSPHandler::~CSPHandler() {
 }
 
-bool CSPHandler::Parse(Extension* extension, string16* error) {
+bool CSPHandler::Parse(Extension* extension, base::string16* error) {
   const std::string key = Keys()[0];
   if (!extension->manifest()->HasPath(key)) {
     if (extension->manifest_version() >= 2) {
       // TODO(abarth): Should we continue to let extensions override the
       //               default Content-Security-Policy?
       std::string content_security_policy = is_platform_app_ ?
           kDefaultPlatformAppContentSecurityPolicy :
           kDefaultContentSecurityPolicy;
 
       CHECK(ContentSecurityPolicyIsSecure(content_security_policy,
@@ skipping 33 matching lines @@
         type == Manifest::TYPE_LEGACY_PACKAGED_APP;
 }
 
 const std::vector<std::string> CSPHandler::Keys() const {
   const std::string& key = is_platform_app_ ?
       keys::kPlatformAppContentSecurityPolicy : keys::kContentSecurityPolicy;
   return SingleKey(key);
 }
 
 }  // namespace extensions