chrome/browser/resources/md_bookmarks/app.html

<link rel="import" href="chrome://resources/html/polymer.html">

<link rel="import" href="chrome://resources/cr_elements/shared_vars_css.html">
<link rel="import" href="chrome://resources/html/cr/ui/splitter.html">
<link rel="import" href="chrome://bookmarks/api_listener.html">
<link rel="import" href="chrome://bookmarks/command_manager.html">
<link rel="import" href="chrome://bookmarks/constants.html">
<link rel="import" href="chrome://bookmarks/dnd_manager.html">
<link rel="import" href="chrome://bookmarks/folder_node.html">
<link rel="import" href="chrome://bookmarks/list.html">
<link rel="import" href="chrome://bookmarks/mouse_focus_behavior.html">
<link rel="import" href="chrome://bookmarks/router.html">
<link rel="import" href="chrome://bookmarks/shared_vars.html">
<link rel="import" href="chrome://bookmarks/store.html">
<link rel="import" href="chrome://bookmarks/toast_manager.html">
<link rel="import" href="chrome://bookmarks/toolbar.html">
<link rel="import" href="chrome://bookmarks/util.html">

<dom-module id="bookmarks-app">
  <template>
    <style>
      :host {
        color: var(--cr-primary-text-color);
        display: flex;
        flex-direction: column;
        height: 100%;
        line-height: 1.54;  /* 20px. */
      }

      #main-container {
        display: flex;
        flex-direction: row;
        flex-grow: 1;
        overflow: hidden;
      }

      #splitter {
        box-sizing: border-box;
        cursor: col-resize;
<if expr="is_win">
        /* Unlike other platforms, e-resize is a two-way arrow on Windows. */
        cursor: e-resize;
</if>
        flex: 0 0 var(--splitter-width);
        opacity: 0;
      }

      #splitter:hover,
      #splitter.splitter-active {
        border-inline-start: 1px solid rgba(0, 0, 0, 0.1);
        opacity: 1;
        transition: opacity 100ms ease-out;
      }

      #sidebar {
        display: block;
        max-width: 40%;
        min-width: var(--min-sidebar-width);
        overflow-y: auto;
        padding: 8px 3px 0 3px;
        user-select: none;
        width: var(--min-sidebar-width);
      }

      bookmarks-list {
        flex: 1;
        overflow-x: hidden;
      }
    </style>
    <bookmarks-toolbar sidebar-width="[[sidebarWidth_]]" role="banner">
    </bookmarks-toolbar>
    <div id="main-container">
       <div id="sidebar" role="tree" aria-label="$i18n{sidebarAxLabel}">
         <bookmarks-folder-node item-id="0" depth="-1"></bookmarks-folder-node>
      </div>
      <div id="splitter"></div>
      <bookmarks-list></bookmarks-list>
    </div>
    <bookmarks-router></bookmarks-router>
    <bookmarks-command-manager></bookmarks-command-manager>
    <bookmarks-toast-manager duration="10000"></bookmarks-toast-manager>
  </template>
  <script src="chrome://bookmarks/app.js"></script>
</dom-module>