ServiceWorker: Use SimpleCache for the script cache

content/browser/service_worker/service_worker_disk_cache.cc

Index: content/browser/service_worker/service_worker_disk_cache.cc
diff --git a/content/browser/service_worker/service_worker_disk_cache.cc b/content/browser/service_worker/service_worker_disk_cache.cc
index 4b6237ff2346a926a380768351d7bd00fb64758a..8906e3ffd23428c73ab0082e2914c43b162471b1 100644
--- a/content/browser/service_worker/service_worker_disk_cache.cc
+++ b/content/browser/service_worker/service_worker_disk_cache.cc
@@ -6,6 +6,10 @@
 
 namespace content {
 
+ServiceWorkerDiskCache::ServiceWorkerDiskCache() {
+  use_simple_cache_ = true;
+}
+
 ServiceWorkerResponseReader::ServiceWorkerResponseReader(
     int64 response_id, ServiceWorkerDiskCache* disk_cache)
     : AppCacheResponseReader(response_id, 0, disk_cache) {