[Do not commit] MD History: Experimentally implement cr-toolbar using cr-search-field

ui/webui/resources/cr_elements/cr_toolbar/cr_toolbar.js

+// Copyright 2016 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.
+
+Polymer({
+  is: 'cr-toolbar',
+
+  properties: {
+    // Name to display in the toolbar, in titlecase.
+    pageName: String,
+    // Prompt text to display in the search field.
+    searchPrompt: String,
+    // Tooltip to display on the clear search button.
+    clearLabel: String,
+
+    showingSearch_: {
+      type: Boolean,
+      reflectToAttribute: true
+    }
+  },
+
+  /** @private */
+  onInputBlur_: function() {
+    if (!this.hasSearchText_)
+      this.showingSearch_ = false;
+  },
+
+  /** @private */
+  onMenuClick_: function(e) {
+    this.fire('cr-toolbar-menu-click');
+  },
+
+  /**
+   * @param {Event} e
+   * @private
+   */
+  showSearch_: function(e) {
+    if (e.target != this.$.clearSearch)
+      this.showingSearch_ = true;
+  }
+});