Don't ignore manifest icons for sites that don't have a service worker.

chrome/browser/banners/app_banner_manager.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/banners/app_banner_manager.h"
 
 #include <algorithm>
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 131 matching lines @@
 
 base::WeakPtr<AppBannerManager> AppBannerManager::GetWeakPtr() {
   return weak_factory_.GetWeakPtr();
 }
 
 AppBannerManager::AppBannerManager(content::WebContents* web_contents)
     : content::WebContentsObserver(web_contents),
       SiteEngagementObserver(SiteEngagementService::Get(
           Profile::FromBrowserContext(web_contents->GetBrowserContext()))),
       state_(State::INACTIVE),
-      manager_(nullptr),
+      manager_(InstallableManager::FromWebContents(web_contents)),
       event_request_id_(-1),
       binding_(this),
       has_sufficient_engagement_(false),
       load_finished_(false),
       page_requested_prompt_(false),
       triggered_by_devtools_(false),
       need_to_log_status_(false),
       weak_factory_(this) {
-  // Ensure the InstallableManager exists since we have a hard dependency on it.
-  InstallableManager::CreateForWebContents(web_contents);
-  manager_ = InstallableManager::FromWebContents(web_contents);
   DCHECK(manager_);
 
   AppBannerSettingsHelper::UpdateFromFieldTrial();
 }
 
 AppBannerManager::~AppBannerManager() { }
 
 std::string AppBannerManager::GetAppIdentifier() {
   DCHECK(!manifest_.IsEmpty());
   return manifest_.start_url.spec();
@@ skipping 413 matching lines @@
   if (is_pending_event()) {
     // Simulate a non-canceled OnBannerPromptReply to show the delayed banner.
     OnBannerPromptReply(blink::mojom::AppBannerPromptReply::NONE, referrer_);
   } else {
     // Log that the prompt request was made for when we get the prompt reply.
     page_requested_prompt_ = true;
   }
 }
 
 }  // namespace banners