Allow banners to trigger on sites which don't register a service worker onload.

chrome/browser/banners/app_banner_manager.h

Index: chrome/browser/banners/app_banner_manager.h
diff --git a/chrome/browser/banners/app_banner_manager.h b/chrome/browser/banners/app_banner_manager.h
index d14251b7dc4aeaf9c35048e288ad112c24d9f9f9..ebb8cbe3214d866d11e739693e19786e68fc9463 100644
--- a/chrome/browser/banners/app_banner_manager.h
+++ b/chrome/browser/banners/app_banner_manager.h
@@ -101,6 +101,14 @@ class AppBannerManager : public content::WebContentsObserver,
     // The banner pipeline is currently running for this page load.
     ACTIVE,
 
+    // The banner pipeline is currently waiting for the page manifest to be
+    // fetched.
+    PENDING_MANIFEST,
+
+    // The banner pipeline is currently waiting for the installability criteria
+    // to be checked.
+    PENDING_INSTALLABLE_CHECK,
+
     // The banner pipeline has finished running, but is waiting for sufficient
     // engagement to trigger the banner.
     PENDING_ENGAGEMENT,
@@ -212,8 +220,18 @@ class AppBannerManager : public content::WebContentsObserver,
   int event_request_id() const { return event_request_id_; }
   bool is_active() const { return state_ == State::ACTIVE; }
   bool is_active_or_pending() const {
-    return state_ == State::ACTIVE || state_ == State::PENDING_ENGAGEMENT ||
-           state_ == State::PENDING_EVENT;
+    switch (state_) {
+      case State::ACTIVE:
+      case State::PENDING_MANIFEST:
+      case State::PENDING_INSTALLABLE_CHECK:
+      case State::PENDING_ENGAGEMENT:
+      case State::PENDING_EVENT:
+        return true;
+      case State::INACTIVE:
+      case State::COMPLETE:
+        return false;
+    }
+    return false;
   }
   bool is_complete() const { return state_ == State::COMPLETE; }
   bool is_pending_engagement() const {