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

chrome/app/generated_resources.grd

Index: chrome/app/generated_resources.grd
diff --git a/chrome/app/generated_resources.grd b/chrome/app/generated_resources.grd
index c61990d43bbff72c48b47d8486dbdd610db1fcbf..03163897ae0a22ae0239835f84cf2b4b86e82cf7 100644
--- a/chrome/app/generated_resources.grd
+++ b/chrome/app/generated_resources.grd
@@ -494,6 +494,12 @@ are declared in build/common.gypi.
       <message name="IDS_MD_HISTORY_SIGN_IN_PROMO_DESC" desc="Description of the sign-in promo. Further tell users to sign in to Chrome to see synced tabs from other devices.">
         Sign in to Chrome to see your tabs from all your devices.
       </message>
+      <message name="IDS_MD_HISTORY_MENU_PROMO" desc="Text body of a promotional tooltip that shows up the first time a user runs the Material Design History UI in narrow mode to help find 'Clear Browsing Data' and the side navigation.">
+        You can clear your browsing data from this menu
+      </message>
+      <message name="IDS_MD_HISTORY_CLOSE_MENU_PROMO" desc="Title text of the close button of a promotional tooltip that shows up the first time a user runs the Material Design History UI in narrow mode to help find 'Clear Browsing Data' and the side navigation.">
+        Close
+      </message>
 
       <!-- Generic terms -->
       <message name="IDS_ADD" desc="Used for Add on buttons">