Get main frame and subframe AppCache loads to work.

content/browser/appcache/mock_appcache_storage.cc

 // Copyright 2014 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/appcache/mock_appcache_storage.h"
 
 #include <stddef.h>
 
 #include "base/bind.h"
 #include "base/location.h"
@@ skipping 183 matching lines @@
     const std::vector<int64_t>& response_ids) {
   // We don't bother with actually removing responses from the disk-cache,
   // just keep track of which ids have been doomed or deleted
   std::vector<int64_t>::const_iterator it = response_ids.begin();
   while (it != response_ids.end()) {
     doomed_response_ids_.insert(*it);
     ++it;
   }
 }
 
+bool MockAppCacheStorage::IsInitialized() {
+  return false;
+}
+
 void MockAppCacheStorage::ProcessGetAllInfo(
     scoped_refptr<DelegateReference> delegate_ref) {
   if (delegate_ref->delegate)
     delegate_ref->delegate->OnAllInfo(simulated_appcache_info_.get());
 }
 
 void MockAppCacheStorage::ProcessLoadCache(
     int64_t id,
     scoped_refptr<DelegateReference> delegate_ref) {
   AppCache* cache = working_set_.GetCache(id);
@@ skipping 341 matching lines @@
 bool MockAppCacheStorage::ShouldCacheLoadAppearAsync(const AppCache* cache) {
   if (!cache)
     return true;
 
   // If the 'stored' ref is the only ref, real storage will have to load from
   // the database.
   return IsCacheStored(cache) && cache->HasOneRef();
 }
 
 }  // namespace content