Exclude exe files while unzipping CRXes

extensions/utility/extension_extractor_filter.h

+// Copyright 2016 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_UTILITY_EXTENSION_EXTRACTOR_FILTER_H_
+#define EXTENSIONS_UTILITY_EXTENSION_EXTRACTOR_FILTER_H_
+
+#include "base/macros.h"
+#include "base/memory/ref_counted.h"
+
+namespace base {
+class FilePath;
+}
+
+namespace extensions {
+
+// Determines which files should be included when unzipping a CRX.
+class ExtensionExtractorFilter
+    : public base::RefCounted<ExtensionExtractorFilter> {

[Devlin, 2016/09/08 21:10:16]

Given this class doesn't need any state, I'd much rather not introduce another
refcounted class.  Let's maybe just have a function.

[meacer, 2016/09/08 22:40:10]

That's fair, I copied this over from ExtensionCreatorFilter. Moved it under
unpacker.cc as a static function.

+ public:
+  ExtensionExtractorFilter() {}
+
+  // Returns true if the given base::FilePath should be unzipped.
+  bool ShouldExtractFile(const base::FilePath& file_path);
+
+ private:
+  friend class base::RefCounted<ExtensionExtractorFilter>;
+  ~ExtensionExtractorFilter() {}
+  DISALLOW_COPY_AND_ASSIGN(ExtensionExtractorFilter);
+};
+
+}  // namespace extensions
+
+#endif  // EXTENSIONS_UTILITY_EXTENSION_EXTRACTOR_FILTER_H_