Prettier "last synced" times on the recent tabs page.

chrome/android/java/strings/android_chrome_strings.grd

Index: chrome/android/java/strings/android_chrome_strings.grd
diff --git a/chrome/android/java/strings/android_chrome_strings.grd b/chrome/android/java/strings/android_chrome_strings.grd
index b8d9f6af069148175bfd05922d16c96602b24778..d8ed580e0452bc369340299f08ff47e97bc646f9 100644
--- a/chrome/android/java/strings/android_chrome_strings.grd
+++ b/chrome/android/java/strings/android_chrome_strings.grd
@@ -1710,17 +1710,20 @@ Just open Chrome on your computer, go to the menu, and select “Sign in to Chro
       <message name="IDS_NTP_RECENT_TABS_SYNC_ENABLE_SYNC_BUTTON" desc="Text that displayed or button that allows the user to enable sync.">
         Enable sync
       </message>
-      <message name="IDS_NTP_RECENT_TABS_LAST_SYNCED_DAYS" desc="Text to show the time since the device last synced in days">
-        Last synced: <ph name="DAYS">%1$d<ex>3</ex></ph> days ago
+      <message name="IDS_NTP_RECENT_TABS_LAST_SYNCED" desc="Label for the time since a device was last synced">
+        Last synced: <ph name="WHEN">%1$s<ex>4 hours ago</ex></ph>
       </message>
-      <message name="IDS_NTP_RECENT_TABS_LAST_SYNCED_HOURS" desc="Text to show the time since the device last synced in hours">
-        Last synced: <ph name="HOURS">%1$d<ex>3</ex></ph> hours ago
+      <message name="IDS_N_MINUTES_AGO" desc="A number of minutes in the past. [ICU Syntax]">
+        {MINUTES, plural, =1 {# minute ago} other {# minutes ago}}
       </message>
-      <message name="IDS_NTP_RECENT_TABS_LAST_SYNCED_MINUTES" desc="Text to show the time since the device last synced in minutes">
-        Last synced: <ph name="MINUTES">%1$d<ex>50</ex></ph> minutes ago
+      <message name="IDS_N_HOURS_AGO" desc="A number of hours in the past. [ICU Syntax]">
+        {HOURS, plural, =1 {# hour ago} other {# hours ago}}
       </message>
-      <message name="IDS_NTP_RECENT_TABS_LAST_SYNCED_JUST_NOW" desc="Text to show that the device was recently synced">
-        Last synced: just now
+      <message name="IDS_N_DAYS_AGO" desc="A number of days in the past. [ICU Syntax]">
+        {DAYS, plural, =1 {# day ago} other {# days ago}}
+      </message>
+      <message name="IDS_JUST_NOW" desc="A time label for an event that happened just now. For example 'Last synced: just now'">
+        just now
       </message>
       <message name="IDS_NTP_RECENT_TABS_ACCESSIBILITY_COLLAPSED_GROUP" desc="Content description for collapsed state indicator for the group view." >
         Collapsed - Click to expand