MD Settings: Add "Show Google Now cards in the launcher" row in Search section.

chrome/browser/ui/webui/settings/search_engines_handler.h

Index: chrome/browser/ui/webui/settings/search_engines_handler.h
diff --git a/chrome/browser/ui/webui/settings/search_engines_handler.h b/chrome/browser/ui/webui/settings/search_engines_handler.h
index 87073863334d77355449adab4e316a0d35634439..2d13fbc35e1d60cf52455084c7c35df8c3b4c21f 100644
--- a/chrome/browser/ui/webui/settings/search_engines_handler.h
+++ b/chrome/browser/ui/webui/settings/search_engines_handler.h
@@ -54,7 +54,7 @@ class SearchEnginesHandler : public SettingsPageUIHandler,
   void OnJavascriptDisallowed() override;
 
  private:
-  // Retrieves all search engines and returns the to WebUI.
+  // Retrieves all search engines and returns them to WebUI.
   void HandleGetSearchEnginesList(const base::ListValue* args);
 
   std::unique_ptr<base::DictionaryValue> GetSearchEnginesList();
@@ -99,6 +99,9 @@ class SearchEnginesHandler : public SettingsPageUIHandler,
   // WebUI call to request a dictionary of hotword related properties.
   void HandleGetHotwordInfo(const base::ListValue* args);
 
+  // WebUI call to request the availability of Google Now cards.
+  void HandleGetGoogleNowAvailability(const base::ListValue* args);
+
   // Constructs a SearchPageHotwordInfo dictionary.
   std::unique_ptr<base::DictionaryValue> GetHotwordInfo();