Add base:: to string16 in extensions/.

extensions/browser/test_management_policy.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/browser/test_management_policy.h"
 
 #include "base/strings/utf_string_conversions.h"
 
 namespace extensions {
 
@@ skipping 23 matching lines @@
 void TestManagementPolicyProvider::SetDisableReason(
     Extension::DisableReason reason) {
   disable_reason_ = reason;
 }
 
 std::string TestManagementPolicyProvider::GetDebugPolicyProviderName() const {
   return "the test management policy provider";
 }
 
 bool TestManagementPolicyProvider::UserMayLoad(const Extension* extension,
-                                               string16* error) const {
+                                               base::string16* error) const {
   if (error && !may_load_)
     *error = error_message_;
   return may_load_;
 }
 
 bool TestManagementPolicyProvider::UserMayModifySettings(
-    const Extension* extension, string16* error) const {
+    const Extension* extension, base::string16* error) const {
   if (error && !may_modify_status_)
     *error = error_message_;
   return may_modify_status_;
 }
 
 bool TestManagementPolicyProvider::MustRemainEnabled(const Extension* extension,
-                                                     string16* error) const {
+                                                     base::string16* error)
+    const {
   if (error && must_remain_enabled_)
     *error = error_message_;
   return must_remain_enabled_;
 }
 
 bool TestManagementPolicyProvider::MustRemainDisabled(
     const Extension* extension,
     Extension::DisableReason* reason,
-    string16* error) const {
+    base::string16* error) const {
   if (must_remain_disabled_) {
     if (error)
       *error = error_message_;
     if (reason)
       *reason = disable_reason_;
   }
   return must_remain_disabled_;
 }
 
 
 }  // namespace extensions