[omnibox] Added 'OmniboxTailSuggestions' flag

chrome/browser/flag_descriptions.cc

Index: chrome/browser/flag_descriptions.cc
diff --git a/chrome/browser/flag_descriptions.cc b/chrome/browser/flag_descriptions.cc
index c8a324b710a1c3c447abbe452838c826e132cf45..e27ad0235756041960ed7b3ba5c978547d477881 100644
--- a/chrome/browser/flag_descriptions.cc
+++ b/chrome/browser/flag_descriptions.cc
@@ -2839,9 +2839,14 @@ const char kEnableCustomFeedbackUiDescription[] =
     defined(OS_WIN)
 
 const char kOmniboxEntitySuggestionsName[] = "Omnibox entity suggestions";
-
 const char kOmniboxEntitySuggestionsDescription[] =
-    "Enable receiving entity suggestions in Omnibox.";
+    "Enable receiving entity suggestions - unambiguation descriptions - for "

[Mark P, 2017/06/01 16:23:58]

nit: I think the word you are looking for is "disambiguation"

[Kevin Bailey, 2017/06/01 17:11:03]

Yes, thanks.

+    "Omnibox suggestions.";
+
+const char kOmniboxTailSuggestionsName[] = "Omnibox tail suggestions";
+const char kOmniboxTailSuggestionsDescription[] =
+    "Enable receiving tail suggestions, an additional type of search "
+    "suggestion, for Omnibox queries.";

[Mark P, 2017/06/01 16:23:58]

"an additional type of search suggestion" is pretty vague.
How about something like "a type of search suggestion based on the last few
words in the query"?

[Kevin Bailey, 2017/06/01 17:11:03]

Ok, but I think these descriptions are more for ruling _out_ flags, as the user
scans the list, so shorter might have been better.

 
 const char kPauseBackgroundTabsName[] = "Pause background tabs";
 const char kPauseBackgroundTabsDescription[] =