Omnibox: Create Field Trial to Always Display Hint Text

chrome/browser/omnibox/omnibox_field_trial.h

Index: chrome/browser/omnibox/omnibox_field_trial.h
diff --git a/chrome/browser/omnibox/omnibox_field_trial.h b/chrome/browser/omnibox/omnibox_field_trial.h
index 95913f9d917ea6ff362820eac10ec0cbd0ade751..9c49b39daa91552001da4dfb3d37374c02f1df7b 100644
--- a/chrome/browser/omnibox/omnibox_field_trial.h
+++ b/chrome/browser/omnibox/omnibox_field_trial.h
@@ -259,9 +259,19 @@ class OmniboxFieldTrial {
   static bool HQPAllowMatchInSchemeValue();
 
   // ---------------------------------------------------------
+  // For the DisplayHintTextWhenPossible experiment that's part of the
+  // bundled omnibox field trial.
+
+  // Returns true of the omnibox should display hint text (Search
+  // <search engine> or type URL) when possible (i.e., the omnibox
+  // is otherwise non-empty).
+  static bool DisplayHintTextWhenPossible();
+
+  // ---------------------------------------------------------
   // Exposed publicly for the sake of unittests.
   static const char kBundledExperimentFieldTrialName[];
   // Rule names used by the bundled experiment.
+  static const char kDisplayHintTextWhenPossibleRule[];
   static const char kShortcutsScoringMaxRelevanceRule[];
   static const char kSearchHistoryRule[];
   static const char kDemoteByTypeRule[];