Use title case for Recent Tabs strings

Title for Recent Tabs' sections should be title cased.

Bug: 426576
Change-Id: I6aadca930ad8925e11cb221d508c926c2e2c83a7
Reviewed-on: https://chromium-review.googlesource.com/684841Reviewed-by: Jean-François Geyelin <jif@chromium.org>
Commit-Queue: Gauthier Ambard <gambard@chromium.org>
Cr-Commit-Position: refs/heads/master@{#504392}

ios/chrome/app/strings/ios_strings.grd

@@ -1068,11 +1068,11 @@ Handoff must also be enabled in the General section of Settings, and your device
       <message name="IDS_IOS_RECENT_TABS_OPEN_ALL_MENU_OPTION" desc="Context menu option to open all tabs from a foreign session. [Length: 15em] [iOS only]">
         Open all
       </message>
-      <message name="IDS_IOS_RECENT_TABS_OTHER_DEVICES" desc="The name of the section informing the user on how to view tabs from other devices.[Length: 15em]">
-        Other devices
+      <message name="IDS_IOS_RECENT_TABS_OTHER_DEVICES" desc="The name of the section informing the user on how to view tabs from other devices.[Length: 25em]">
+        Other Devices
       </message>
       <message name="IDS_IOS_RECENT_TABS_RECENTLY_CLOSED" desc="The heading of the recently closed section in the recent tab panel. [Length: 35em] [iOS only]">
-        Recently closed
+        Recently Closed
       </message>
       <message name="IDS_IOS_SAFE_MODE_AW_SNAP" desc="The title of the safe mode UI after multiple crashes.  This is intended to be a humorous exclamation of dismay. [Length: 30em]">
         Aw, Snap!