Add an initial implementation of the downloads MD settings page.

chrome/browser/resources/settings/downloads_page/downloads_page.js

Index: chrome/browser/resources/settings/downloads_page/downloads_page.js
diff --git a/chrome/browser/resources/settings/downloads_page/downloads_page.js b/chrome/browser/resources/settings/downloads_page/downloads_page.js
new file mode 100644
index 0000000000000000000000000000000000000000..fdf7f0d960d49d43df7c7a28a6bbc62a87718f9c
--- /dev/null
+++ b/chrome/browser/resources/settings/downloads_page/downloads_page.js
@@ -0,0 +1,42 @@
+// Copyright 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.
+
+/**
+ * @fileoverview
+ * 'cr-settings-downloads-page' is the settings page containing all downloads
+ * settings.
+ *
+ * Example:
+ *
+ *    <core-animated-pages>
+ *      <cr-settings-downloads-page></cr-settings-downloads-page>
+ *      ... other pages ...
+ *    </core-animated-pages>
+ *
+ * @group Chrome Settings Elements
+ * @element cr-settings-downloads-page
+ */
+Polymer('cr-settings-downloads-page', {
+  publish: {
+    /**
+     * Preferences state.
+     *
+     * @attribute prefs
+     * @type CrSettingsPrefsElement
+     * @default null
+     */
+    prefs: null,
+  },
+
+  selectDownloadLocation: function() {
+    // TODO(orenb): Communicate with the C++ to actually display a folder
+    // picker.
+    this.$.downloadsPath.value = '/Downloads';
+  },
+
+  updatePromptForDownload: function() {
+    this.prefs.settings.download.promptForDownload =
+        this.$.promptForDownload.checked;

[michaelpg, 2015/03/09 21:24:08]

hmm I'm a little confused by this. It doesn't look like checkbox has this ID. Is
this function necessary or can we do this with data binding?

[Oren Blasberg, 2015/03/09 21:39:13]

Oops -- yes, you're right. I'd added this method in a temporary state, then
realized data binding was all that we needed, then forgot to delete this method.
Deleted.

+  },
+});