Slice MD downloads into more components

chrome/browser/resources/md_downloads/toolbar.js

+// 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.
+
+cr.define('downloads', function() {
+  var Toolbar = Polymer({
+    is: 'downloads-toolbar',
+
+    /** @param {!downloads.ActionService} actionService */
+    setActionService: function(actionService) {
+      /** @private {!downloads.ActionService} */
+      this.actionService_ = actionService;
+    },
+
+    properties: {
+      canClearAll: {
+        type: Boolean,
+        value: false,
+      },
+
+      showingSearch_: {
+        type: Boolean,
+        value: false,
+      },
+    },
+
+    /** @return {boolean} Whether removal can be undone. */
+    canUndo: function() {
+      return this.$['search-term'] != document.activeElement;
+    },
+
+    /** @private */
+    onClearAllClick_: function() {
+      this.actionService_.clearAll();
+    },
+
+    /** @private */
+    onOpenDownloadsFolderClick_: function() {
+      this.actionService_.openDownloadsFolder();
+    },
+
+    /** @private */
+    toggleShowingSearch_: function() {
+      this.showingSearch_ = !this.showingSearch_;
+    },
+  });
+
+  return {Toolbar: Toolbar};
+});