PreloadCheck class for extension pre-install checks

chrome/browser/extensions/blacklist_check.cc

Index: chrome/browser/extensions/blacklist_check.cc
diff --git a/chrome/browser/extensions/blacklist_check.cc b/chrome/browser/extensions/blacklist_check.cc
new file mode 100644
index 0000000000000000000000000000000000000000..afa6a44849e24ece0a29dcbf7c6e1e844318d37b
--- /dev/null
+++ b/chrome/browser/extensions/blacklist_check.cc
@@ -0,0 +1,37 @@
+// 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 "chrome/browser/extensions/blacklist_check.h"
+
+#include "base/bind.h"
+#include "chrome/browser/extensions/blacklist.h"
+
+namespace extensions {
+
+BlacklistCheck::BlacklistCheck(Blacklist* blacklist,
+                               scoped_refptr<const Extension> extension)
+    : PreloadCheck(extension), blacklist_(blacklist), weak_ptr_factory_(this) {}
+
+BlacklistCheck::~BlacklistCheck() {}
+
+void BlacklistCheck::Start(ResultCallback callback) {
+  callback_ = std::move(callback);
+
+  blacklist_->IsBlacklisted(
+      extension()->id(),
+      base::Bind(&BlacklistCheck::OnBlacklistedStateRetrieved,
+                 weak_ptr_factory_.GetWeakPtr()));
+}
+
+void BlacklistCheck::OnBlacklistedStateRetrieved(
+    BlacklistState blacklist_state) {
+  Errors errors;
+  if (blacklist_state == BlacklistState::BLACKLISTED_MALWARE)
+    errors.insert(PreloadCheck::BLACKLISTED_ID);
+  else if (blacklist_state == BlacklistState::BLACKLISTED_UNKNOWN)
+    errors.insert(PreloadCheck::BLACKLISTED_UNKNOWN);
+  std::move(callback_).Run(errors);
+}
+
+}  // namespace extensions