ServiceWorker: Use SimpleCache for the script cache

content/browser/appcache/appcache_disk_cache.cc

Index: content/browser/appcache/appcache_disk_cache.cc
diff --git a/content/browser/appcache/appcache_disk_cache.cc b/content/browser/appcache/appcache_disk_cache.cc
index 382ed45fed2197ae8be5b861e1f310d18a118694..082b2d3547deae743e89738d9cbc97b3b2c98a34 100644
--- a/content/browser/appcache/appcache_disk_cache.cc
+++ b/content/browser/appcache/appcache_disk_cache.cc
@@ -178,6 +178,9 @@ class AppCacheDiskCache::ActiveCall {
 
 AppCacheDiskCache::AppCacheDiskCache()
     : is_disabled_(false) {
+#if defined(APPCACHE_USE_SIMPLE_CACHE)
+  use_simple_cache_ = true;

[michaeln, 2015/05/14 23:35:26]

nit: initializer list instead of the method body

[nhiroki, 2015/05/15 02:12:51]

Done.

+#endif
 }
 
 AppCacheDiskCache::~AppCacheDiskCache() {
@@ -310,14 +313,10 @@ int AppCacheDiskCache::Init(
   is_disabled_ = false;
   create_backend_callback_ = new CreateBackendCallbackShim(this);
 
-#if defined(APPCACHE_USE_SIMPLE_CACHE)
-  const net::BackendType backend_type = net::CACHE_BACKEND_SIMPLE;
-#else
-  const net::BackendType backend_type = net::CACHE_BACKEND_DEFAULT;
-#endif
   int rv = disk_cache::CreateCacheBackend(
       cache_type,
-      backend_type,
+      use_simple_cache_ ? net::CACHE_BACKEND_SIMPLE
+                        : net::CACHE_BACKEND_DEFAULT,
       cache_directory,
       cache_size,
       force,