Adds a basic offline check to InstallableManager.

chrome/browser/installable/installable_manager.cc

 // Copyright 2016 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/installable/installable_manager.h"
 
 #include "base/bind.h"
 #include "base/stl_util.h"
 #include "base/strings/string_util.h"
 #include "chrome/browser/manifest/manifest_icon_downloader.h"
@@ skipping 394 matching lines @@
           Profile::FromBrowserContext(web_contents->GetBrowserContext()),
           web_contents->GetSiteInstance());
   DCHECK(storage_partition);
 
   storage_partition->GetServiceWorkerContext()->CheckHasServiceWorker(
       web_contents->GetLastCommittedURL(), manifest().start_url,
       base::Bind(&InstallableManager::OnDidCheckHasServiceWorker,
                  weak_factory_.GetWeakPtr()));
 }
 
-void InstallableManager::OnDidCheckHasServiceWorker(bool has_service_worker) {
+void InstallableManager::OnDidCheckHasServiceWorker(
+    content::ServiceWorkerCapability capability) {
   if (!GetWebContents())
     return;
 
-  if (has_service_worker) {
-    installable_->installable = true;
-  } else {
-    installable_->installable = false;
-    installable_->error = NO_MATCHING_SERVICE_WORKER;
+  switch (capability) {
+    case content::ServiceWorkerCapability::SERVICE_WORKER_WITH_FETCH_HANDLER:
+      installable_->installable = true;
+      break;
+    case content::ServiceWorkerCapability::SERVICE_WORKER_NO_FETCH_HANDLER:
+      installable_->installable = false;
+      installable_->error = NOT_OFFLINE_CAPABLE;
+      break;
+    case content::ServiceWorkerCapability::NO_SERVICE_WORKER:
+      installable_->installable = false;
+      installable_->error = NO_MATCHING_SERVICE_WORKER;
+      break;
   }
 
   installable_->fetched = true;
   WorkOnTask();
 }
 
 void InstallableManager::CheckAndFetchBestIcon(const IconParams& params) {
   DCHECK(!manifest().IsEmpty());
 
   int ideal_icon_size_in_px = std::get<0>(params);
@@ skipping 57 matching lines @@
   return manifest_->url;
 }
 
 const content::Manifest& InstallableManager::manifest() const {
   return manifest_->manifest;
 }
 
 bool InstallableManager::is_installable() const {
   return installable_->installable;
 }