Implementation of Device End of Life Notification

chrome/browser/resources/help/help_content.html

  <div class="content-area">
   <div id="about-container">
     <img id="product-logo" srcset="chrome://theme/current-channel-logo@1x 1x,
                                    chrome://theme/current-channel-logo@2x 2x"
         alt="">
     <div id="product-description">
       <h2 i18n-content="aboutProductTitle"></h2>
       <span i18n-content="aboutProductDescription"></span>
     </div>
   </div>
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         <div id="allowed-connection-types-message" hidden></div>
       </div>
     </div>
     <div id="update-buttons-container">
       <div id="update-percentage" hidden></div>
 <if expr="is_macosx">
       <button id="promote" i18n-content="promote" hidden></button>
 </if>
       <button id="relaunch" i18n-content="relaunch" hidden></button>
 <if expr="chromeos">
+      <div id ="eol-message" hidden></div>
       <button id="relaunch-and-powerwash"
           i18n-content="relaunchAndPowerwash" hidden>
       </button>
       <button id="request-update" i18n-content="updateButton">
       </button>
       <div id="controlled-feature-icon" class="help-page-icon" hidden></div>
 </if>
     </div>
 </if>
 <if expr="chromeos">
@@ skipping 55 matching lines @@
 <if expr="_google_chrome">
     <div id="product-tos"></div>
 </if>
   </div>
 <if expr="chromeos">
   <div id="regulatory-label-container" hidden>
     <img id="regulatory-label">
   </div>
 </if>
 </div>