[MD History] Add grouped history toolbar.

chrome/browser/resources/md_history/history_toolbar.html

 <link rel="import" href="chrome://resources/html/polymer.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/iron-flex-layout/iron-flex-layout.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-button/paper-button.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-icon-button/paper-icon-button.html">
+<link rel="import" href="chrome://resources/polymer/v1_0/iron-icons/hardware-icons.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-spinner/paper-spinner.html">
+<link rel="import" href="chrome://resources/polymer/v1_0/paper-tabs/paper-tab.html">
+<link rel="import" href="chrome://resources/polymer/v1_0/paper-tabs/paper-tabs.html">
 <link rel="import" href="chrome://resources/cr_elements/cr_search_field/cr_search_field.html">
 <link rel="import" href="chrome://history/shared_style.html">
 
 <dom-module id="history-toolbar">
   <template>
     <style include="shared-style">
       :host {
         color: #fff;
-        height: 56px;
         transition: background-color 150ms;
+        width: 100%;
       }
 
-      :host,
       #overlay-buttons,
       #overlay-wrapper,
       #main-content,
       #button-container,
       #toolbar-container {
         @apply(--layout-center);
         @apply(--layout-horizontal);
         width: 100%;
       }
 
       :host([items-selected_]) {
         background: rgb(68, 136, 255);
       }
 
       h1 {
         @apply(--layout-flex);
         -webkit-padding-start: 24px;
         font-size: 123%;
         font-weight: 400;
       }
 
+      #toolbar-container {
+        height: 56px;
+      }
+
       #right-content {
         flex: 1 0 0;
       }
 
       #left-content {
         flex: 1 0 var(--side-bar-width);
       }
 
       #centered-content {
         /** Padding-start gives space on one side, flex-basis gives space on the
@@ skipping 26 matching lines @@
       }
 
       #overlay-wrapper {
         -webkit-margin-start: var(--side-bar-width);
       }
 
       #number-selected {
         @apply(--layout-flex);
       }
 
-      paper-icon-button {
+      #cancel-icon-button {
         -webkit-margin-end: 24px;
         -webkit-margin-start: 2px;
         height: 36px;
         min-width: 36px;
         width: 36px;
       }
 
-      paper-button {
-        pointer-events: auto;
+      #grouped-nav-container paper-icon-button {
+        --paper-icon-button-ink-color: rgba(255, 255, 255, 0.4);
+        -webkit-margin-start: 24px;
+        flex: 0 0 auto;
+      }
+
+      paper-tab {
+        --paper-tab-ink: rgba(255, 255, 255, 0.4);
+        text-transform: uppercase;

[tsergeant, 2016/05/11 04:19:29]

Nit: Move this line down one for sorting reasons. (The CSS presubmit gets
confused sometimes)

[calamity, 2016/05/12 07:27:06]

Done.

+        font-size: 13px;
+      }
+
+      paper-tabs {
+        --paper-tabs-selection-bar-color: var(--google-blue-500);
+        height: 45px;
+        min-width: 300px;
+      }
+
+      #grouped-buttons-container {
+        -webkit-margin-start: var(--side-bar-width);
+        @apply(--layout-center);

[tsergeant, 2016/05/11 04:19:29]

Nit: @apply comes first, then --variable lines, then -webkit lines

[calamity, 2016/05/12 07:27:06]

Done.

+        @apply(--layout-horizontal);
+      }
+
+      #grouped-period-buttons {
+        -webkit-margin-start: 32px;
+      }
+
+      #grouped-nav-container {
+        -webkit-margin-end: 24px;

[tsergeant, 2016/05/11 04:19:29]

Move this down, as above.

[calamity, 2016/05/12 07:27:06]

Done.

+        @apply(--layout-center);
+        @apply(--layout-end-justified);
+        @apply(--layout-flex);
+        @apply(--layout-horizontal);
+        overflow: hidden;
+        transition: opacity 150ms;
+      }
+
+      :host([grouped-period=all]) #grouped-nav-container {
+        opacity: 0;
+        pointer-events: none;
+      }
+
+      #grouped-date {
+        flex: 0 1 auto;
+        opacity: 0.7;
+        overflow: hidden;
+        text-align: right;
+        text-overflow: ellipsis;
+        white-space: nowrap;
+      }
+
+      :host([is-rtl_]) .rtl-reversible {

[tsergeant, 2016/05/11 04:19:29]

psst,

here's a trick you won't find anywhere else because nowhere documents it
properly:

Replace :host([is-rtl_]) with :host-context([dir=rtl])

:host-context selects based on whether anything -above- the host matches the
selector [dir=rtl] (or something like that, anyway). It's used in a few places:
https://code.google.com/p/chromium/codesearch#search/&q=host-context%20file:c...

[calamity, 2016/05/12 07:27:06]

Gnarly.

[Dan Beam, 2016/05/12 19:34:29]

http://robdodson.me/shadow-dom-css-cheat-sheet/#host-context
As propagator of this hack, I Thoroughly Endorse This Message(TM)

(let's just hope there's not a [dir=ltr] closer in the ancestry ;))

+        transform: rotate(180deg);
       }
     </style>
     <div id="toolbar-container">
       <div id="main-content" hidden$="[[itemsSelected_]]">
         <div id="left-content">
           <h1 id="title">$i18n{title}</h1>
         </div>
         <div id="centered-content">
           <div id="right-content">
             <paper-spinner id="searching-spinner" active="[[searching]]">
@@ skipping 12 matching lines @@
           <div id="number-selected">[[numberOfItemsSelected_(count)]]</div>
           <paper-button id="cancel-button" on-tap="onClearSelectionTap_">
             $i18n{cancel}
           </paper-button>
           <paper-button id="delete-button" on-tap="onDeleteTap_">
             $i18n{delete}
           </paper-button>
         </div>
       </div>
     </div>
+    <template is="dom-if" if="[[isGroupedMode]]">
+      <div id="grouped-buttons-container">
+        <paper-tabs attr-for-selected="value" selected="{{groupedPeriod}}"
+            id="grouped-period-buttons">
+          <paper-tab value="0">$i18n{rangeAllTime}</paper-tab>
+          <paper-tab value="1">$i18n{rangeWeek}</paper-tab>
+          <paper-tab value="2">$i18n{rangeMonth}</paper-tab>
+        </paper-tabs>
+        <div id="grouped-nav-container">
+          <span id="grouped-date">
+            {{getHistoryInterval_(queryStartTime, queryEndTime)}}
+          </span>
+          <paper-icon-button icon="today" alt="$i18n{rangeToday}"
+              title="$i18n{rangeToday}"></paper-icon-button>
+          <paper-icon-button icon="hardware:keyboard-arrow-left"
+              alt="$i18n{rangePrevious}" title="$i18n{rangePrevious}"
+              class="rtl-reversible"></paper-icon-button>
+          <paper-icon-button icon="hardware:keyboard-arrow-right"
+              alt="$i18n{rangeNext}" title="$i18n{rangeNext}"
+              class="rtl-reversible"></paper-icon-button>
+        </div>
+      </div>
+    </template>
   </template>
   <script src="chrome://history/history_toolbar.js"></script>
 </dom-module>