Bugfix for correctly removing temporary file when cancelled.

Bug: 714579
Cq-Include-Trybots: master.tryserver.chromium.linux:closure_compilation
Change-Id: I4459f9a3b2e024ce6305f93a4c886600a81b73b6
Reviewed-on: https://chromium-review.googlesource.com/995243Reviewed-by: Naoki Fukino <fukino@chromium.org>
Commit-Queue: Tatsuhisa Yamaguchi <yamaguchi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#548360}

chrome/browser/resources/chromeos/zip_archiver/js/compressor.js

@@ -722,8 +722,9 @@ unpacker.Compressor.prototype.onErrorInternal_ = function() {
 unpacker.Compressor.prototype.removeTemporaryFileIfExists_ = function() {
   if (!this.archiveFileEntry_)
     return;
+  const entry = this.archiveFileEntry_;
   this.archiveFileEntry_ = null;
-  this.archiveFileEntry_.remove(
+  entry.remove(
       function() {},
       function(error) {
         console.error('failed to remove temporary file.');