Refactor ExtensionManifestTest to allow usage in src/extensions

extensions/common/test_util.h

 // Copyright 2014 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.
 
 #ifndef EXTENSIONS_COMMON_TEST_UTIL_H_
 #define EXTENSIONS_COMMON_TEST_UTIL_H_
 
 #include <string>
 
 #include "base/memory/ref_counted.h"
-#include "base/memory/scoped_ptr.h"
-
-namespace base {
-class DictionaryValue;
-}  // namespace base
 
 namespace extensions {
 class Extension;
 class ExtensionBuilder;
 
 namespace test_util {
 
 // Adds an extension manifest to a builder.
 ExtensionBuilder& BuildExtension(ExtensionBuilder& builder);
 
 // Creates an extension instance that can be attached to an ExtensionFunction
 // before running it.
 scoped_refptr<Extension> CreateEmptyExtension();
 
 // Return a very simple extension with a given |id|.
 scoped_refptr<Extension> CreateExtensionWithID(const std::string& id);
 
-// Parses |json| allowing trailing commas and replacing single quotes with
-// double quotes for test readability. If the json fails to parse, calls gtest's
-// ADD_FAILURE and returns an empty dictionary.
-scoped_ptr<base::DictionaryValue> ParseJsonDictionaryWithSingleQuotes(
-    std::string json);
-
 }  // namespace test_util
 }  // namespace extensions
 
 #endif  // EXTENSIONS_COMMON_TEST_UTIL_H_