Allow the app banner installability check to run on page load.

chrome/common/chrome_features.cc

Index: chrome/common/chrome_features.cc
diff --git a/chrome/common/chrome_features.cc b/chrome/common/chrome_features.cc
index cb09f4cc2443f012208b0c327f55b88bf2849701..91f89b533d0731d31d297ad02778330d11516ec5 100644
--- a/chrome/common/chrome_features.cc
+++ b/chrome/common/chrome_features.cc
@@ -90,6 +90,10 @@ const base::Feature kTabStripKeyboardFocus{"TabStripKeyboardFocus",
                                            base::FEATURE_DISABLED_BY_DEFAULT};
 #endif  // defined(OS_MACOSX)
 
+// Whether to trigger app banner installability checks on page load.
+const base::Feature kCheckInstallabilityForBannerOnLoad{
+    "CheckInstallabilityForBannerOnLoad", base::FEATURE_DISABLED_BY_DEFAULT};
+
 #if defined(OS_ANDROID)
 // Experiment to make Geolocation permissions in the omnibox and the default
 // search engine's search page consistent.