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 278ad00e79c7796b3efe7eea35108c31406107c1..ce9d5f58c4613df5cafe682ca9c06f726e4ee890 100644
--- a/chrome/common/chrome_features.cc
+++ b/chrome/common/chrome_features.cc
@@ -92,6 +92,10 @@ 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_WIN)
 const base::Feature kCleanupToolUI{"CleanupToolUI",
                                    base::FEATURE_DISABLED_BY_DEFAULT};