Enable "Hide Extension" option when "Save Link As" on the Mac

content/browser/download/base_file.cc

Index: content/browser/download/base_file.cc
diff --git a/content/browser/download/base_file.cc b/content/browser/download/base_file.cc
index f9b80155018d4a00aa2a6df90bcb32b3666c2672..0ce0e10aeabd6adef5ea1181ba09a900adc73e00 100644
--- a/content/browser/download/base_file.cc
+++ b/content/browser/download/base_file.cc
@@ -41,7 +41,8 @@ BaseFile::BaseFile(const base::FilePath& full_path,
       start_tick_(base::TimeTicks::Now()),
       calculate_hash_(calculate_hash),
       detached_(false),
-      bound_net_log_(bound_net_log) {
+      bound_net_log_(bound_net_log),
+      hide_file_extension_(false) {
   memcpy(sha256_hash_, kEmptySha256Hash, crypto::kSHA256Length);
   if (calculate_hash_) {
     secure_hash_.reset(crypto::SecureHash::Create(crypto::SecureHash::SHA256));
@@ -251,6 +252,10 @@ std::string BaseFile::DebugString() const {
                             detached_ ? 'T' : 'F');
 }
 
+void BaseFile::set_hide_file_extension(bool hide_file_extension) {
+  hide_file_extension_ = hide_file_extension;
+}
+
 DownloadInterruptReason BaseFile::Open() {
   DCHECK_CURRENTLY_ON(BrowserThread::FILE);
   DCHECK(!detached_);