Update Polymer from 1.2.1 -> 1.2.3

third_party/polymer/v1_0/components-chromium/paper-toolbar/README.md

-paper-toolbar
-============
+
+<!---
 
+This README is automatically generated from the comments in these files:
+paper-toolbar.html
+
+Edit those files, and our readme bot will duplicate them over here!
+Edit this file, and the bot will squash your changes :)
+
+-->
+
+[![Build Status](https://travis-ci.org/PolymerElements/paper-toolbar.svg?branch=master)](https://travis-ci.org/PolymerElements/paper-toolbar)
+
+_[Demo and API Docs](https://elements.polymer-project.org/elements/paper-toolbar)_
+
+
+##&lt;paper-toolbar&gt;
+
+
+Material design: [Toolbars](https://www.google.com/design/spec/components/toolbars.html)
+
 `paper-toolbar` is a horizontal bar containing items that can be used for
 label, navigation, search and actions.  The items place inside the
 `paper-toolbar` are projected into a `class="horizontal center layout"` container inside of
 `paper-toolbar`'s Shadow DOM.  You can use flex attributes to control the items'
 sizing.
 
 Example:
 
-```html
-<paper-toolbar>
-  <paper-icon-button icon="menu" on-tap="{{menuAction}}"></paper-icon-button>
-  <div class="title">Title</div>
-  <paper-icon-button icon="more" on-tap="{{moreAction}}"></paper-icon-button>
-</paper-toolbar>
-```
+    <paper-toolbar>
+      <paper-icon-button icon="menu" on-tap="menuAction"></paper-icon-button>
+      <div class="title">Title</div>
+      <paper-icon-button icon="more-vert" on-tap="moreAction"></paper-icon-button>
+    </paper-toolbar>
 
 `paper-toolbar` has a standard height, but can made be taller by setting `tall`
 class on the `paper-toolbar`.  This will make the toolbar 3x the normal height.
 
-```html
-<paper-toolbar class="tall">
-  <paper-icon-button icon="menu"></paper-icon-button>
-</paper-toolbar>
-```
+    <paper-toolbar class="tall">
+      <paper-icon-button icon="menu"></paper-icon-button>
+    </paper-toolbar>
 
 Apply `medium-tall` class to make the toolbar medium tall.  This will make the
 toolbar 2x the normal height.
 
-```html
-<paper-toolbar class="medium-tall">
-  <paper-icon-button icon="menu"></paper-icon-button>
-</paper-toolbar>
-```
+    <paper-toolbar class="medium-tall">
+      <paper-icon-button icon="menu"></paper-icon-button>
+    </paper-toolbar>
 
 When `tall`, items can pin to either the top (default), middle or bottom.  Use
 `middle` class for middle content and `bottom` class for bottom content.
 
-```html
-<paper-toolbar class="tall">
-  <paper-icon-button icon="menu"></paper-icon-button>
-  <div class="title middle">Middle Title</div>
-  <div class="title bottom">Bottom Title</div>
-</paper-toolbar>
-```
+    <paper-toolbar class="tall">
+      <paper-icon-button icon="menu"></paper-icon-button>
+      <div class="middle title">Middle Title</div>
+      <div class="bottom title">Bottom Title</div>
+    </paper-toolbar>
 
 For `medium-tall` toolbar, the middle and bottom contents overlap and are
 pinned to the bottom.  But `middleJustify` and `bottomJustify` attributes are
 still honored separately.
 
 To make an element completely fit at the bottom of the toolbar, use `fit` along
 with `bottom`.
 
-```html
-<paper-toolbar class="tall">
-  <div id="progressBar" class="bottom fit"></div>
-</paper-toolbar>
-```
+    <paper-toolbar class="tall">
+      <div id="progressBar" class="bottom fit"></div>
+    </paper-toolbar>
+
+### Styling
+
+The following custom properties and mixins are available for styling:
+
+Custom property | Description | Default
+----------------|-------------|----------
+`--paper-toolbar-background` | Toolbar background color     | `--default-primary-color`
+`--paper-toolbar-color`      | Toolbar foreground color     | `--text-primary-color`
+`--paper-toolbar-height`     | Custom height for toolbar    | `64px`
+`--paper-toolbar-sm-height`  | Custom height for small screen toolbar | `56px`
+`--paper-toolbar`            | Mixin applied to the toolbar | `{}`
+`--paper-toolbar-medium`     | Mixin applied to medium height toolbar | `{}`
+`--paper-toolbar-tall`       | Mixin applied to tall height toolbar | `{}`
+
+### Accessibility
+
+`<paper-toolbar>` has `role="toolbar"` by default. Any elements with the class `title` will
+be used as the label of the toolbar via `aria-labelledby`.
+
+