Removing x-x509-user-cert mime handler.

chrome/browser/download/download_target_determiner.cc

 // Copyright 2013 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 "chrome/browser/download/download_target_determiner.h"
 
 #include "base/location.h"
 #include "base/prefs/pref_service.h"
 #include "base/rand_util.h"
 #include "base/single_thread_task_runner.h"
@@ skipping 176 matching lines @@
     // The download is being resumed and the user has already been prompted for
     // a path. Assume that it's okay to overwrite the file if there's a conflict
     // and reuse the selection.
     should_prompt_ = ShouldPromptForDownload(virtual_path_);
   } else if (!is_forced_path) {
     // If we don't have a forced path, we should construct a path for the
     // download. Forced paths are only specified for programmatic downloads
     // (WebStore, Drag&Drop). Treat the path as a virtual path. We will
     // eventually determine whether this is a local path and if not, figure out
     // a local path.
+
+    std::string suggested_filename = download_->GetSuggestedFilename();
+    if (download_->GetMimeType() == "application/x-x509-user-cert")

[asanka, 2016/01/11 21:52:42]

How about conditionalizing this on suggested_filename being empty? It would make
the behavior consistent if there's an actual suggested filename (e.g.: a
@download attribute on an anchor).

I don't have a strong opinion on this since the handling of this type is
evolving. So feel free to push back. But I think the eventual state should
respect filename suggestions.

+      suggested_filename = "user.crt";
+
     std::string default_filename(
         l10n_util::GetStringUTF8(IDS_DEFAULT_DOWNLOAD_FILENAME));
     base::FilePath generated_filename = net::GenerateFileName(
         download_->GetURL(),
         download_->GetContentDisposition(),
         GetProfile()->GetPrefs()->GetString(prefs::kDefaultCharset),
-        download_->GetSuggestedFilename(),
+        suggested_filename,
         download_->GetMimeType(),
         default_filename);
     should_prompt_ = ShouldPromptForDownload(generated_filename);
     base::FilePath target_directory;
     if (should_prompt_) {
       DCHECK(!download_prefs_->IsDownloadPathManaged());
       // If the user is going to be prompted and the user has been prompted
       // before, then always prefer the last directory that the user selected.
       target_directory = download_prefs_->SaveFilePath();
     } else {
@@ skipping 682 matching lines @@
     const base::FilePath& suggested_path) {
   return base::FilePath(suggested_path.value() + kCrdownloadSuffix);
 }
 
 #if defined(OS_WIN)
 // static
 bool DownloadTargetDeterminer::IsAdobeReaderUpToDate() {
   return g_is_adobe_reader_up_to_date_;
 }
 #endif