MD Settings: Add "Auto Open" setting to Downloads page UI.

chrome/browser/ui/webui/settings/downloads_handler.cc

 // Copyright (c) 2015 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/ui/webui/settings/downloads_handler.h"
 
 #include "base/values.h"
 #include "chrome/browser/download/download_prefs.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/chrome_select_file_policy.h"
@@ skipping 15 matching lines @@
 
 DownloadsHandler::~DownloadsHandler() {
   // There may be pending file dialogs, we need to tell them that we've gone
   // away so they don't try and call back to us.
   if (select_folder_dialog_.get())
     select_folder_dialog_->ListenerDestroyed();
 }
 
 void DownloadsHandler::RegisterMessages() {
   web_ui()->RegisterMessageCallback(
       "initializeDownloads",

[Dan Beam, 2017/02/27 05:50:36]

where is this already called?  was this just unused code until now?

[tommycli, 2017/02/28 00:47:26]

Yes, added in the previous CL, used in this CL for the first time.

       base::Bind(&DownloadsHandler::HandleInitialize, base::Unretained(this)));
   web_ui()->RegisterMessageCallback(
+      "resetAutoOpenFileTypes",
+      base::Bind(&DownloadsHandler::HandleResetAutoOpenFileTypes,
+                 base::Unretained(this)));
+  web_ui()->RegisterMessageCallback(
       "selectDownloadLocation",
       base::Bind(&DownloadsHandler::HandleSelectDownloadLocation,
                  base::Unretained(this)));
 }
 
 void DownloadsHandler::OnJavascriptAllowed() {
   pref_registrar_.Init(profile_->GetPrefs());
   pref_registrar_.Add(
       prefs::kDownloadExtensionsToOpen,
       base::Bind(&DownloadsHandler::SendAutoOpenDownloadsToJavascript,
@@ skipping 12 matching lines @@
 void DownloadsHandler::SendAutoOpenDownloadsToJavascript() {
   content::DownloadManager* manager =
       content::BrowserContext::GetDownloadManager(profile_);
   bool auto_open_downloads =
       manager && DownloadPrefs::FromDownloadManager(manager)->IsAutoOpenUsed();
   CallJavascriptFunction("cr.webUIListenerCallback",
                          base::StringValue("auto-open-downloads-changed"),
                          base::FundamentalValue(auto_open_downloads));
 }
 
+void DownloadsHandler::HandleResetAutoOpenFileTypes(
+    const base::ListValue* args) {
+  content::RecordAction(UserMetricsAction("Options_ResetAutoOpenFiles"));
+  content::DownloadManager* manager =
+      content::BrowserContext::GetDownloadManager(profile_);
+  if (manager)
+    DownloadPrefs::FromDownloadManager(manager)->ResetAutoOpen();
+}
+
 void DownloadsHandler::HandleSelectDownloadLocation(
     const base::ListValue* args) {
   PrefService* pref_service = profile_->GetPrefs();
   select_folder_dialog_ = ui::SelectFileDialog::Create(
       this, new ChromeSelectFilePolicy(web_ui()->GetWebContents()));
   ui::SelectFileDialog::FileTypeInfo info;
   info.allowed_paths = ui::SelectFileDialog::FileTypeInfo::NATIVE_OR_DRIVE_PATH;
   select_folder_dialog_->SelectFile(
       ui::SelectFileDialog::SELECT_FOLDER,
       l10n_util::GetStringUTF16(IDS_SETTINGS_DOWNLOAD_LOCATION),
       pref_service->GetFilePath(prefs::kDownloadDefaultDirectory), &info, 0,
       base::FilePath::StringType(),
       web_ui()->GetWebContents()->GetTopLevelNativeWindow(), NULL);
 }
 
 void DownloadsHandler::FileSelected(const base::FilePath& path,
                                     int index,
                                     void* params) {
   content::RecordAction(UserMetricsAction("Options_SetDownloadDirectory"));
   PrefService* pref_service = profile_->GetPrefs();
   pref_service->SetFilePath(prefs::kDownloadDefaultDirectory, path);
   pref_service->SetFilePath(prefs::kSaveFileDefaultDirectory, path);
 }
 
 }  // namespace settings