Change privacy strings

The privacy setting strings for the suggestions is confusing.
This CL disambiguate them.

Bug: 751731
Change-Id: I1e91133b085b73d35553337c9341fda15234f7d1
Reviewed-on: https://chromium-review.googlesource.com/599870Reviewed-by: Elodie Banel <lod@chromium.org>
Commit-Queue: Gauthier Ambard <gambard@chromium.org>
Cr-Commit-Position: refs/heads/master@{#491970}

ios/chrome/app/strings/ios_strings.grd

@@ -810,7 +810,7 @@ To adjust your search term, long press to select. To refine your search, slide t
         Advanced
       </message>
       <message name="IDS_IOS_OPTIONS_CONTENT_SUGGESTIONS" desc="Title for the option to turn on/off content suggestions. [Length: 20em] [iOS only]">
-        Show Content Suggestions
+        Article suggestions
       </message>
       <message name="IDS_IOS_OPTIONS_CONTINUITY_LABEL" desc="Title for group of items in the Privacy settings table, including Handoff. [Length: 10em] [iOS only]">
         Other Devices
@@ -877,7 +877,7 @@ Handoff must also be enabled in the General section of Settings, and your device
         Report an Issue
       </message>
       <message name="IDS_IOS_OPTIONS_SEARCH_URL_SUGGESTIONS" desc="Title for the option to turn on/off search and URL suggestions. [Length: 18em] [iOS only]">
-        Show Suggestions
+        Search and site suggestions
       </message>
       <message name="IDS_IOS_OPTIONS_SEND_USAGE_DATA" desc="Title for opening the setting for if/when to send usage data and crash reports. [Length: 20em] [iOS only]">
         Send Usage Data