[BackgroundSync] Only allow SyncManager.register to occur from main frame

content/browser/service_worker/service_worker_context_wrapper.cc

 // Copyright 2013 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 "content/browser/service_worker/service_worker_context_wrapper.h"
 
 #include <map>
 #include <set>
 #include <string>
 #include <vector>
@@ skipping 463 matching lines @@
 }
 
 std::vector<ServiceWorkerVersionInfo>
 ServiceWorkerContextWrapper::GetAllLiveVersionInfo() {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
   if (!context_core_)
     return std::vector<ServiceWorkerVersionInfo>();
   return context_core_->GetAllLiveVersionInfo();
 }
 
-bool ServiceWorkerContextWrapper::HasWindowProviderHost(
-    const GURL& origin) const {
+void ServiceWorkerContextWrapper::HasMainFrameProviderHost(
+    const GURL& origin,
+    const BoolCallback& callback) const {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
-  if (!context_core_)
-    return false;
-  return context_core_->HasWindowProviderHost(origin);
+  if (!context_core_) {
+    base::ThreadTaskRunnerHandle::Get()->PostTask(FROM_HERE,
+                                                  base::Bind(callback, false));
+    return;
+  }
+  context_core_->HasMainFrameProviderHost(origin, callback);
 }
 
 void ServiceWorkerContextWrapper::FindRegistrationForDocument(
     const GURL& document_url,
     const FindRegistrationCallback& callback) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
   if (!context_core_) {
     // FindRegistrationForDocument() can run the callback synchronously.
     callback.Run(SERVICE_WORKER_ERROR_ABORT, nullptr);
     return;
@@ skipping 192 matching lines @@
   observer_list_->Notify(FROM_HERE,
                          &ServiceWorkerContextObserver::OnStorageWiped);
 }
 
 ServiceWorkerContextCore* ServiceWorkerContextWrapper::context() {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
   return context_core_.get();
 }
 
 }  // namespace content