MD WebUI: Add shared cr-toolbar element

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

Index: ui/webui/resources/cr_elements/cr_toolbar/cr_toolbar.js
diff --git a/ui/webui/resources/cr_elements/cr_toolbar/cr_toolbar.js b/ui/webui/resources/cr_elements/cr_toolbar/cr_toolbar.js
new file mode 100644
index 0000000000000000000000000000000000000000..829b44e17ffa21061a30cc9a99ac6aa93b3547cf
--- /dev/null
+++ b/ui/webui/resources/cr_elements/cr_toolbar/cr_toolbar.js
@@ -0,0 +1,35 @@
+// 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: {
+    /** @private */
+    narrow_: {
+      type: Boolean,
+      reflectToAttribute: true
+    },
+
+    /** @private */
+    showingSearch_: {
+      type: Boolean,
+      reflectToAttribute: true,
+    },
+
+    // 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,
+  },
+
+  /** @return {!CrToolbarSearchFieldElement} */
+  getSearchField: function() {
+    return this.$.search;
+  }
+});