Add strings to allow experimenting with non-article content in the feed.

Bug: 1011100
Change-Id: Icd63616b1cceab782cb767a19489222f3c53b24e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1906630
Reviewed-by: Carlos Knippschild <carlosk@chromium.org>
Reviewed-by: Chris Sharp <csharp@chromium.org>
Reviewed-by: Tommy Martino <tmartino@chromium.org>
Commit-Queue: Chris Sharp <csharp@chromium.org>
Cr-Commit-Position: refs/heads/master@{#714927}

components/ntp_snippets_strings.grdp

@@ -23,6 +23,19 @@
     </message>
   </if>
 
+  <if expr="use_titlecase">
+    <message name="IDS_NTP_SUGGESTIONS_SECTION_HEADER" desc="Header of the suggested content section, which is a list of suggested content displayed as cards on the New Tab Page. This will replace a string 'Articles for You', which was used when the suggested content was just news articles. ">
+      For You
+    </message>
+  </if>
+
+  <if expr="not use_titlecase">
+    <message name="IDS_NTP_SUGGESTIONS_SECTION_HEADER" desc="Header of the suggested content section, which is a list of suggested content displayed as cards on the New Tab Page. This will replace a string 'Articles for You', which was used when the suggested content was just news articles. " formatter_data="android_java">
+      For you
+    </message>
+  </if>
+
+
   <message name="IDS_NTP_ARTICLE_SUGGESTIONS_SECTION_EMPTY" desc="On the New Tab Page, text of the card explaining to the user that they can expect to see suggested articles in this area in the future.">
     Your suggested articles appear here
   </message>