[omnibox] Added 'OmniboxTailSuggestions' flag

chrome/browser/flag_descriptions.cc

 // Copyright 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/flag_descriptions.h"
 
 namespace flag_descriptions {
 
 //  Material Design version of chrome://bookmarks
 
@@ skipping 2821 matching lines @@
 const char kEnableCustomFeedbackUiDescription[] =
     "Enables a custom feedback UI when submitting feedback through Google "
     "Feedback. Works with Google Play Services v10.2+";
 
 #endif  // defined(OS_ANDROID)
 
 #if defined(OS_CHROMEOS) || defined(OS_LINUX) || defined(OS_MACOSX) || \
     defined(OS_WIN)
 
 const char kOmniboxEntitySuggestionsName[] = "Omnibox entity suggestions";
+const char kOmniboxEntitySuggestionsDescription[] =
+    "Enable receiving entity suggestions - disambiguation descriptions - for "
+    "Omnibox suggestions.";
 
-const char kOmniboxEntitySuggestionsDescription[] =
-    "Enable receiving entity suggestions in Omnibox.";
+const char kOmniboxTailSuggestionsName[] = "Omnibox tail suggestions";
+const char kOmniboxTailSuggestionsDescription[] =
+    "Enable receiving tail suggestions, a type of search suggestion "
+    "based on the last few words in the query, for the Omnibox.";
 
 const char kPauseBackgroundTabsName[] = "Pause background tabs";
 const char kPauseBackgroundTabsDescription[] =
     "Pause timers in background tabs after 5 minutes on desktop.";
 
 const char kEnableNewAppMenuIconName[] = "Enable the New App Menu Icon";
 const char kEnableNewAppMenuIconDescription[] =
     "Use the new app menu icon with update notification animations.";
 
 #endif  // defined(OS_CHROMEOS) || defined(OS_LINUX) || defined(OS_MACOSX) ||
@@ skipping 361 matching lines @@
 
 const char kDisableNewVirtualKeyboardBehaviorName[] =
     "New window behavior for the accessibility keyboard";
 const char kDisableNewVirtualKeyboardBehaviorDescription[] =
     "Disable new window behavior for the accessibility keyboard "
     "in non-sticky mode (do not change work area in non-sticky mode).";
 
 #endif  // defined(OS_CHROMEOS)
 
 }  // namespace flag_descriptions