Omnibox UI Experiments: Add feature flags for 3 URL elision experiments.

chrome/browser/about_flags.cc

Index: chrome/browser/about_flags.cc
diff --git a/chrome/browser/about_flags.cc b/chrome/browser/about_flags.cc
index a82600c6606b64628f786eca1d8093bca558d48b..793d8e96c35e09a6feadc1e096c43bea47c81504 100644
--- a/chrome/browser/about_flags.cc
+++ b/chrome/browser/about_flags.cc
@@ -2989,6 +2989,23 @@ const FeatureEntry kFeatureEntries[] = {
      SINGLE_VALUE_TYPE(switches::kShowCertLink)},
 #endif
 
+    {"omnibox-ui-hide-suggestion-url-path",
+     flag_descriptions::kOmniboxUIHideSuggestionUrlPathName,
+     flag_descriptions::kOmniboxUIHideSuggestionUrlPathDescription, kOsDesktop,
+     FEATURE_VALUE_TYPE(omnibox::kUIExperimentHideSuggestionUrlPath)},
+
+    {"omnibox-ui-hide-suggestion-url-protocol",
+     flag_descriptions::kOmniboxUIHideSuggestionUrlProtocolName,
+     flag_descriptions::kOmniboxUIHideSuggestionUrlProtocolDescription,
+     kOsDesktop,
+     FEATURE_VALUE_TYPE(omnibox::kUIExperimentHideSuggestionUrlProtocol)},
+
+    {"omnibox-ui-hide-suggestion-url-subdomain",
+     flag_descriptions::kOmniboxUIHideSuggestionUrlSubdomainName,

[Justin Donnelly, 2017/06/13 20:58:12]

"Hide subdomain" feels like it's over-specifying what this is intended to do. I
know it'll make the identifiers somewhat ridiculously long, but how about adding
"trivial" to these? For example,
kOmniboxUIHideSuggestionUrlTrivialSubdomainsName, etc.

[tommycli, 2017/06/13 21:47:09]

Done.

+     flag_descriptions::kOmniboxUIHideSuggestionUrlSubdomainDescription,
+     kOsDesktop,
+     FEATURE_VALUE_TYPE(omnibox::kUIExperimentHideSuggestionUrlSubdomain)},
+
     {"omnibox-ui-max-autocomplete-matches",
      flag_descriptions::kOmniboxUIMaxAutocompleteMatchesName,
      flag_descriptions::kOmniboxUIMaxAutocompleteMatchesDescription, kOsDesktop,