PreloadCheck class for extension pre-install checks

extensions/browser/preload_check_test_util.cc

Index: extensions/browser/preload_check_test_util.cc
diff --git a/extensions/browser/preload_check_test_util.cc b/extensions/browser/preload_check_test_util.cc
new file mode 100644
index 0000000000000000000000000000000000000000..c69bafb3b3e0e0439af9e66d47e5407a77a69ca7
--- /dev/null
+++ b/extensions/browser/preload_check_test_util.cc
@@ -0,0 +1,39 @@
+// 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.
+
+#include "extensions/browser/preload_check_test_util.h"
+
+#include "base/bind.h"
+#include "base/bind_helpers.h"
+#include "base/logging.h"
+#include "base/run_loop.h"
+
+namespace extensions {
+
+PreloadCheckRunner::PreloadCheckRunner() : called_(false) {}
+PreloadCheckRunner::~PreloadCheckRunner() {}
+
+void PreloadCheckRunner::OnCheckComplete(PreloadCheck::Errors errors) {
+  CHECK(!called_);
+  called_ = true;
+  errors_ = errors;
+}
+
+void PreloadCheckRunner::RunUntilComplete(PreloadCheck* check) {
+  check->Start(GetCallback());
+  CHECK(!called_);
+  Wait();
+  CHECK(called_);
+}
+
+PreloadCheck::ResultCallback PreloadCheckRunner::GetCallback() {
+  return base::Bind(&PreloadCheckRunner::OnCheckComplete,
+                    base::Unretained(this));
+}
+
+void PreloadCheckRunner::Wait() {
+  base::RunLoop().RunUntilIdle();
+}
+
+}  // namespace extensions