PreloadCheck class for extension pre-install checks

extensions/browser/preload_check_test_util.h

+// Copyright 2017 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_BROWSER_PRELOAD_CHECK_TEST_UTIL_H_
+#define EXTENSIONS_BROWSER_PRELOAD_CHECK_TEST_UTIL_H_
+
+#include "extensions/browser/preload_check.h"
+
+namespace extensions {
+
+// Provides a callback method for a PreloadCheck that stores its results.
+class PreloadCheckRunner {
+ public:
+  PreloadCheckRunner();
+  virtual ~PreloadCheckRunner();
+
+  // Starts the check and waits for its callback to execute.
+  void RunUntilComplete(PreloadCheck* check);
+
+  // Waits to give asynchronous tasks a chance to complete.
+  void Wait();
+
+  PreloadCheck::ResultCallback GetCallback();
+
+  const PreloadCheck::Errors& errors() const { return errors_; }
+  bool called() const { return called_; }
+
+ private:
+  void OnCheckComplete(PreloadCheck::Errors errors);
+
+  PreloadCheck::Errors errors_;
+  bool called_;
+
+  DISALLOW_COPY_AND_ASSIGN(PreloadCheckRunner);
+};
+
+}  // namespace extensions
+
+#endif  // EXTENSIONS_BROWSER_PRELOAD_CHECK_TEST_UTIL_H_