MD History: promote menu button to show clear browsing data in narrow mode

chrome/browser/resources/md_history/browser_service.js

Index: chrome/browser/resources/md_history/browser_service.js
diff --git a/chrome/browser/resources/md_history/browser_service.js b/chrome/browser/resources/md_history/browser_service.js
index 6d1e3f187bfd11b98be22f5cd2e76eb3afef179f..36e973131a37f7c6edc06a956c585d6f66dc6695 100644
--- a/chrome/browser/resources/md_history/browser_service.js
+++ b/chrome/browser/resources/md_history/browser_service.js
@@ -117,6 +117,10 @@ cr.define('md_history', function() {
       this.pendingDeleteItems_ = null;
       this.pendingDeletePromise_ = null;
     },
+
+    menuPromoShown: function() {
+      chrome.send('menuPromoShown');
+    },
   };
 
   cr.addSingletonGetter(BrowserService);