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

content/browser/download/base_file.cc

 // Copyright (c) 2012 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 "content/browser/download/base_file.h"
 
 #include "base/bind.h"
 #include "base/files/file.h"
 #include "base/files/file_util.h"
 #include "base/format_macros.h"
@@ skipping 23 matching lines @@
                    base::File file,
                    const net::BoundNetLog& bound_net_log)
     : full_path_(full_path),
       source_url_(source_url),
       referrer_url_(referrer_url),
       file_(file.Pass()),
       bytes_so_far_(received_bytes),
       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));
     if ((bytes_so_far_ > 0) &&  // Not starting at the beginning.
         (!IsEmptyHash(hash_state_bytes))) {
       base::Pickle hash_state(hash_state_bytes.c_str(),
                               hash_state_bytes.size());
       base::PickleIterator data_iterator(hash_state);
       secure_hash_->Deserialize(&data_iterator);
     }
@@ skipping 189 matching lines @@
   return base::StringPrintf("{ source_url_ = \"%s\""
                             " full_path_ = \"%" PRFilePath "\""
                             " bytes_so_far_ = %" PRId64
                             " detached_ = %c }",
                             source_url_.spec().c_str(),
                             full_path_.value().c_str(),
                             bytes_so_far_,
                             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_);
   DCHECK(!full_path_.empty());
 
   bound_net_log_.BeginEvent(
       net::NetLog::TYPE_DOWNLOAD_FILE_OPENED,
       base::Bind(&FileOpenedNetLogCallback, &full_path_, bytes_so_far_));
 
   // Create a new file if it is not provided.
@@ skipping 76 matching lines @@
     const char* operation,
     int os_error,
     DownloadInterruptReason reason) {
   bound_net_log_.AddEvent(
       net::NetLog::TYPE_DOWNLOAD_FILE_ERROR,
       base::Bind(&FileInterruptedNetLogCallback, operation, os_error, reason));
   return reason;
 }
 
 }  // namespace content