MD History: hide tooltip promo when drawer is swiped open

chrome/browser/resources/md_history/app.html

Index: chrome/browser/resources/md_history/app.html
diff --git a/chrome/browser/resources/md_history/app.html b/chrome/browser/resources/md_history/app.html
index f6a3538678cc677c61dce4972f8487d674ebad8c..2d9482ed15724b7330e69ae0457ade324814e618 100644
--- a/chrome/browser/resources/md_history/app.html
+++ b/chrome/browser/resources/md_history/app.html
@@ -21,10 +21,12 @@
         display: block;
         height: 100%;
         overflow: hidden;
+        z-index: 0;
       }
 
       history-toolbar {
         background: var(--md-toolbar-color);
+        z-index: 2;
       }
 
       /* Sizing this with flex causes slow load performance, see
@@ -32,6 +34,7 @@
       #main-container {
         height: calc(100% - var(--toolbar-height));
         position: relative;
+        z-index: 1;
       }
 
       :host([grouped_]) #main-container {
@@ -55,6 +58,10 @@
         display: none;
       }
 
+      #drawer {
+        z-index: 3;
+      }
+
       #drawer-header {
         align-items: center;
         border-bottom: 1px solid rgba(0, 0, 0, 0.08);
@@ -99,7 +106,9 @@
         query-start-time="[[queryResult_.info.queryStartTime]]"
         query-end-time="[[queryResult_.info.queryEndTime]]"
         has-drawer="[[hasDrawer_]]"
-        show-sync-notice="[[showSyncNotice_(hasSyncedResults, selectedPage_)]]">
+        show-sync-notice="[[showSyncNotice_(hasSyncedResults, selectedPage_)]]"
+        show-menu-promo="[[showMenuPromo_]]"
+        on-cr-toolbar-promo-close="onCrToolbarPromoClose_">

[calamity, 2016/10/27 03:20:31]

nit: The rest of the event listeners are in the js listeners object. May as well
put this one there so it doesn't get lonely.

[Dan Beam, 2016/10/27 03:42:18]

Done.

     </history-toolbar>
 
     <div id="main-container">
@@ -128,7 +137,8 @@
     </div>
 
     <template is="dom-if" if="[[hasDrawer_]]">
-      <app-drawer id="drawer" swipe-open align="start" tabindex="0">
+      <app-drawer id="drawer" swipe-open align="start" tabindex="0"
+          on-opened-changed="onOpenedChanged_">
         <div id="drawer-header">
           <h1>$i18n{title}</h1>
         </div>