[MD History] Updates the signin promo text for "Tabs from other devices" subpage.

before: https://screenshot.googleplex.com/KjwA5O8fX2D.png
after: https://screenshot.googleplex.com/eRH0ibx9yKe.png

BUG=651121

Review-Url: https://codereview.chromium.org/2431553003
Cr-Commit-Position: refs/heads/master@{#427140}

chrome/app/generated_resources.grd

@@ -489,10 +489,10 @@ are declared in build/common.gypi.
         Sign in to Chrome
       </message>
       <message name="IDS_MD_HISTORY_SIGN_IN_PROMO" desc="Text of the sign-in promo. This will show up if a user is not logged in and has no synced tabs.">
-        Pick up where you left off
+        Continue from another device
       </message>
-      <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 name="IDS_MD_HISTORY_SIGN_IN_PROMO_DESC" desc="Description of the sign-in promo. Further tells users to sign in to Chrome to see synced tabs from other devices.">
+        To get your tabs from your other devices, sign in to Chrome.
       </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