Replace --add-to-shelf flag with kAppBanners feature.

chrome/browser/flag_descriptions.cc

Index: chrome/browser/flag_descriptions.cc
diff --git a/chrome/browser/flag_descriptions.cc b/chrome/browser/flag_descriptions.cc
index 1e624042772791fbc3e6e8ce9e7df6a3dd6b860a..8e9b4f7153713134053dc2f02790ab786f629810 100644
--- a/chrome/browser/flag_descriptions.cc
+++ b/chrome/browser/flag_descriptions.cc
@@ -264,9 +264,9 @@ const char kScrollPredictionDescription[] =
     "Predicts the finger's future position during scrolls allowing time to "
     "render the frame before the finger is there.";
 
-const char kAddToShelfName[] = "Add to shelf";
+const char kAppBannersName[] = "App Banners";
 
-const char kAddToShelfDescription[] =
+const char kAppBannersDescription[] =
     "Enable the display of add to shelf banners, which prompt a user to add "

[Matt Giuca, 2017/06/22 01:40:38]

s/add to shelf/app/ since that's a CrOS-specific term. Or "Progressive Web App
banners" perhaps clearer under the new terminology.

[benwells, 2017/06/22 05:57:48]

Done.

     "a web app to their shelf, or other platform-specific equivalent.";