Name ui::TouchBarAction::TEXT_SUGGESTION in enums.xml.

Bug: 871870
Change-Id: Ia5d7ac9082566bf201ac059987651beb03ce6108
Reviewed-on: https://chromium-review.googlesource.com/c/1450421
Auto-Submit: Sidney San Martín <sdy@chromium.org>
Reviewed-by: Avi Drissman <avi@chromium.org>
Commit-Queue: Avi Drissman <avi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#628525}

tools/metrics/histograms/enums.xml

@@ -10962,6 +10962,7 @@ Called by update_net_error_codes.py.-->
   <int value="6" label="Star"/>
   <int value="7" label="New Tab"/>
   <int value="8" label="Credit Card Autofill"/>
+  <int value="9" label="Text Suggestion"/>
 </enum>
 
 <enum name="DefaultWebClientState">