Add doodle sharing button and sharing dialog to local NTP test data.

Bug: 896461
Change-Id: Ie34adadd37e87630816d5a776429c06e7d1ec204
Reviewed-on: https://chromium-review.googlesource.com/c/1370203Reviewed-by: Kyle Milka <kmilka@chromium.org>
Commit-Queue: David Lu <davidluphd@google.com>
Cr-Commit-Position: refs/heads/master@{#615659}

chrome/test/data/local_ntp/local_ntp_browsertest.html

@@ -31,9 +31,11 @@
         <div id="logo-non-white" title="Google"></div>
         <!-- A doodle, if any: its link and image. -->
         <div id="logo-doodle">
-          <button id="logo-doodle-button">
-            <img id="logo-doodle-image" tabindex="-1"></img>
-          </button>
+          <div id="logo-doodle-container">
+            <button id="logo-doodle-button">
+              <img id="logo-doodle-image" tabindex="-1"></img>
+            </button>
+          </div>
           <iframe id="logo-doodle-iframe" scrolling="no"></iframe>
           <!-- A spinner, visible on dark-themed NTPs, prompting the doodle -->
           <button id="logo-doodle-notifier">
@@ -113,6 +115,23 @@
       </div>
     </dialog>
 
+    <dialog id="ddlsd">
+      <div id="ddlsd-title"></div>
+      <button id="ddlsd-close"></button>
+      <div id="ddlsd-content">
+        <button id="ddlsd-fbb" class="ddlsd-sbtn"></button>
+        <button id="ddlsd-twb" class="ddlsd-sbtn"></button>
+        <button id="ddlsd-emb" class="ddlsd-sbtn"></button>
+        <hr id="ddlsd-hr">
+        <div id="ddlsd-link">
+          <button id="ddlsd-copy"></button>
+          <span id="ddlsd-text-ctr">
+            <input type="text" id="ddlsd-text" dir="ltr">
+          </span>
+        </div>
+      </div>
+    </dialog>
+
     <dialog id="bg-sel-menu">
       <div id="bg-sel-title-bar">
       <div id="bg-sel-back-circle" tabindex="0" role="button">