Index: extensions/browser/preload_check.h |
diff --git a/extensions/browser/preload_check.h b/extensions/browser/preload_check.h |
new file mode 100644 |
index 0000000000000000000000000000000000000000..011cbbbb2952eb7818f69b3da0a66bd1797088c6 |
--- /dev/null |
+++ b/extensions/browser/preload_check.h |
@@ -0,0 +1,60 @@ |
+// 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_H_ |
+#define EXTENSIONS_BROWSER_PRELOAD_CHECK_H_ |
+ |
+#include <memory> |
+#include <unordered_set> |
+#include <utility> |
+ |
+#include "base/callback.h" |
+#include "base/macros.h" |
+#include "base/memory/ref_counted.h" |
+#include "base/strings/string16.h" |
+#include "extensions/common/extension.h" |
+ |
+namespace extensions { |
+ |
+// Encapsulates a possibly asynchronous operation to verify whether a |
+// precondition holds for loading the given extension. |
+class PreloadCheck { |
+ public: |
+ // These enumerators should only be referred to by name, so it is safe to |
+ // insert or remove values as necessary. |
+ enum Error { |
+ NONE, |
+ BLACKLISTED_ID, |
+ BLACKLISTED_UNKNOWN, |
+ DISALLOWED_BY_POLICY, |
+ }; |
+ |
+ // TODO(michaelpg): Remove std::hash<int> template argument once std::hash |
+ // directly supports enums. |
+ // See http://www.open-std.org/jtc1/sc22/wg21/docs/lwg-defects.html#2148 |
+ using Errors = std::unordered_set<Error, std::hash<int>>; |
Devlin
2017/03/14 01:44:34
Any reason to use unordered_set here? Seems like
michaelpg
2017/03/14 21:58:30
/shrug/ std::set sgtm
|
+ using ResultCallback = base::OnceCallback<void(Errors)>; |
+ |
+ explicit PreloadCheck(scoped_refptr<const Extension> extension); |
+ virtual ~PreloadCheck(); |
+ |
+ // This function must be called on the UI thread. The callback also occurs on |
+ // the UI thread. |
+ virtual void Start(ResultCallback callback) = 0; |
+ |
+ // Subclasses may provide an error message. |
+ virtual base::string16 GetErrorMessage() const; |
+ |
+ const Extension* extension() { return extension_.get(); } |
+ |
+ private: |
+ // The extension to check. |
+ scoped_refptr<const Extension> extension_; |
+ |
+ DISALLOW_COPY_AND_ASSIGN(PreloadCheck); |
+}; |
+ |
+} // namespace extensions |
+ |
+#endif // EXTENSIONS_BROWSER_PRELOAD_CHECK_H_ |