Make JSONParser a pure interface.

components/safe_json/testing_json_parser.cc

+// Copyright 2015 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 "components/safe_json/testing_json_parser.h"
+
+#include "base/bind.h"
+#include "base/bind_helpers.h"
+#include "base/json/json_reader.h"
+#include "base/location.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/message_loop/message_loop.h"
+#include "base/values.h"
+
+namespace safe_json {
+
+namespace {
+
+SafeJsonParser* CreateTestingJsonParser(
+    const std::string& unsafe_json,
+    const SafeJsonParser::SuccessCallback& success_callback,
+    const SafeJsonParser::ErrorCallback& error_callback) {
+  return new TestingJsonParser(unsafe_json, success_callback, error_callback);
+}
+
+}  // namespace
+
+TestingJsonParser::ScopedFactoryOverride::ScopedFactoryOverride() {
+  SafeJsonParser::SetFactoryForTesting(&CreateTestingJsonParser);
+}
+
+TestingJsonParser::ScopedFactoryOverride::~ScopedFactoryOverride() {
+  SafeJsonParser::SetFactoryForTesting(nullptr);
+}
+
+TestingJsonParser::TestingJsonParser(const std::string& unsafe_json,
+                                     const SuccessCallback& success_callback,
+                                     const ErrorCallback& error_callback)
+    : unsafe_json_(unsafe_json),
+      success_callback_(success_callback),
+      error_callback_(error_callback) {}
+
+TestingJsonParser::~TestingJsonParser() {}
+
+void TestingJsonParser::Start() {
+  int error_code;
+  std::string error;
+  scoped_ptr<base::Value> value = base::JSONReader::ReadAndReturnError(
+      unsafe_json_, base::JSON_PARSE_RFC, &error_code, &error);
+
+  // Run the callback asynchronously.
+  base::MessageLoop::current()->PostTask(
+      FROM_HERE, value ? base::Bind(success_callback_, base::Passed(&value))
+                       : base::Bind(error_callback_, error));
+  base::MessageLoop::current()->DeleteSoon(FROM_HERE, this);
+}
+
+}  // namespace