Exclude exe files while unzipping CRXes

extensions/utility/unpacker.cc

Index: extensions/utility/unpacker.cc
diff --git a/extensions/utility/unpacker.cc b/extensions/utility/unpacker.cc
index 4c3dbd48a947979061842f9d4b12cb64d8bae7b2..217c31a91a81dc6fe678ebb77d4f0549e0002af3 100644
--- a/extensions/utility/unpacker.cc
+++ b/extensions/utility/unpacker.cc
@@ -115,6 +115,12 @@ Unpacker::Unpacker(const base::FilePath& working_dir,
 Unpacker::~Unpacker() {
 }
 
+// static
+bool Unpacker::ShouldExtractFile(const base::FilePath& file_path) {
+  return !base::FilePath::CompareEqualIgnoreCase(file_path.FinalExtension(),
+                                                 FILE_PATH_LITERAL(".exe"));
+}
+
 std::unique_ptr<base::DictionaryValue> Unpacker::ReadManifest() {
   base::FilePath manifest_path = extension_dir_.Append(kManifestFilename);
   if (!base::PathExists(manifest_path)) {