Replace paper-checkbox with a paper-icon-button-light

chrome/browser/resources/md_history/history_item.html

 <link rel="import" href="chrome://resources/cr_elements/icons.html">
 <link rel="import" href="chrome://resources/html/polymer.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/iron-icon/iron-icon.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-checkbox/paper-checkbox.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-icon-button/paper-icon-button-light.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-styles/shadow.html">
 <link rel="import" href="chrome://resources/html/icon.html">
 <link rel="import" href="chrome://resources/html/util.html">
 <link rel="import" href="chrome://history/browser_service.html">
 <link rel="import" href="chrome://history/constants.html">
 <link rel="import" href="chrome://history/searched_label.html">
 <link rel="import" href="chrome://history/shared_style.html">
 
 <dom-module id="history-item">
   <template>
     <style include="shared-style">
       :host {
+        --checked-color: rgb(68, 136, 255);
         display: block;
       }
 
       :host(:not([embedded])) #main-container {
         position: relative;
       }
 
       :host(:not([embedded])) #sizing-container {
         @apply(--card-sizing);
       }
@@ skipping 33 matching lines @@
       }
 
       #title-and-domain {
         align-items: center;
         display: flex;
         flex: 1;
         height: var(--item-height);
         overflow: hidden;
       }
 
-      paper-checkbox {
-        --paper-checkbox-checked-color: rgb(68, 136, 255);
-        --paper-checkbox-size: 16px;
-        --paper-checkbox-unchecked-color: var(--secondary-text-color);
-        height: 16px;
-        margin: 0 16px 0 20px;
-        padding: 2px;
-        width: 16px;
+      #checkbox {
+        -webkit-margin-end: 6px;
+        -webkit-margin-start: 10px;
+        height: 40px;
+        width: 40px;
+      }
+
+      :host([selected]) #checkbox {
+        color: var(--checked-color);
+      }
+
+      #checkmark {
+        border: 2px solid var(--secondary-text-color);
+        border-radius: 2px;
+        height: 12px;
+        margin: 12px;
+        width: 12px;
+      }
+
+      #checkmark::after {
+        border-color: inherit;
+        border-style: solid;
+        border-width: 0 2px 2px 0;
+        content: '';
+        display: block;
+        height: 8px;
+        transform: scale(0) rotate(45deg);
+        transform-origin: 97% 86%;

[tsergeant, 2016/09/12 23:24:57]

paper-checkbox changes this transform-origin for RTL contexts. Is that necessary
here?

https://github.com/PolymerElements/paper-checkbox/blob/master/paper-checkbox....

[Dan Beam, 2016/09/13 05:23:00]

I've done everything the <paper-checkbox> says! Even the stuff that contradicts
the other stuff!

+        transition: transform 140ms ease-out;
+        width: 4px;
+      }
+
+      :host([selected]) #checkmark {
+        background: var(--checked-color);
+        border-color: var(--checked-color);
+      }
+
+      :host([selected]) #checkmark::after {
+        border-color: white;
+        transform: scale(1) rotate(45deg);
       }
 
       #time-accessed {
         color: #646464;
         min-width: 96px;
       }
 
       #domain {
         -webkit-margin-start: 16px;
         color: var(--secondary-text-color);
         flex-shrink: 0;
       }
 
       #menu-button {
         -webkit-margin-end: 12px;
       }
 
       #star-container {
         -webkit-margin-end: 4px;
         -webkit-margin-start: 12px;
         width: 32px;
       }
 
       #bookmark-star {
-        color: rgb(68, 136, 255);
+        color: var(--checked-color);
         height: 32px;
         width: 32px;
       }
 
       #bookmark-star iron-icon {
         height: 16px;
         width: 16px;
       }
 
       #time-gap-separator {
@@ skipping 51 matching lines @@
 
     <div id="sizing-container">
       <div id="main-container">
         <div id="background-clip">
           <div id="background"></div>
         </div>
         <div id="date-accessed" class="card-title">
           [[cardTitle_(numberOfItems, item.dateRelativeDay, searchTerm)]]
         </div>
         <div id="item-container">
-          <paper-checkbox id="checkbox" on-mousedown="onCheckboxMousedown_"
-              on-click="onCheckboxSelected_" checked="{{selected}}"
+          <button is="paper-icon-button-light" id="checkbox"
+              on-mousedown="onCheckboxMousedown_"
+              on-click="onCheckboxSelected_"
               disabled="[[selectionNotAllowed_()]]"
+              role="checkbox"
+              aria-checked$="[[getBoolString_(selected)]]"
               aria-label$="[[getEntrySummary_(item)]]">
-          </paper-checkbox>
+            <div id="checkmark"></div>
+          </button>
           <span id="time-accessed">[[item.readableTimestamp]]</span>
           <div class="website-icon" id="icon"></div>
           <div id="title-and-domain">
             <a href="[[item.url]]" id="title" class="website-title"
                 title="[[item.title]]" on-click="onLinkClick_"
                 on-contextmenu="onLinkRightClick_">
               <history-searched-label title="[[item.title]]"
                   search-term="[[searchTerm]]"></history-searched-label>
             </a>
             <span id="domain">[[item.domain]]</span>
@@ skipping 13 matching lines @@
             <div></div>
             <div></div>
           </button>
         </div>
         <div id="time-gap-separator" hidden="[[!hasTimeGap]]"></div>
       </div>
     </div>
   </template>
   <script src="chrome://history/history_item.js"></script>
 </dom-module>