[Home Modern] Add a separate flag for showing Doodle on NTP

BUG=757841

Change-Id: I84590b7f5b49a7fb363b39a8580ec5285b5db75f
Reviewed-on: https://chromium-review.googlesource.com/626756
Commit-Queue: Theresa <[email protected]>
Reviewed-by: Matthew Jones <[email protected]>
Reviewed-by: Maria Khomenko <[email protected]>
Cr-Commit-Position: refs/heads/master@{#496556}
diff --git a/chrome/browser/flag_descriptions.h b/chrome/browser/flag_descriptions.h
index b35e2596..7c1af4ba 100644
--- a/chrome/browser/flag_descriptions.h
+++ b/chrome/browser/flag_descriptions.h
@@ -900,6 +900,9 @@
 extern const char kBackgroundLoaderForDownloadsName[];
 extern const char kBackgroundLoaderForDownloadsDescription[];
 
+extern const char kChromeHomeDoodleName[];
+extern const char kChromeHomeDoodleDescription[];
+
 extern const char kChromeHomeExpandButtonName[];
 extern const char kChromeHomeExpandButtonDescription[];