Loading from the "most appropiate" appcache.

content/browser/appcache/appcache_dispatcher_host.cc

Index: content/browser/appcache/appcache_dispatcher_host.cc
===================================================================
--- content/browser/appcache/appcache_dispatcher_host.cc	(revision 78411)
+++ content/browser/appcache/appcache_dispatcher_host.cc	(working copy)
@@ -63,6 +63,7 @@
   IPC_BEGIN_MESSAGE_MAP_EX(AppCacheDispatcherHost, message, *message_was_ok)
     IPC_MESSAGE_HANDLER(AppCacheHostMsg_RegisterHost, OnRegisterHost)
     IPC_MESSAGE_HANDLER(AppCacheHostMsg_UnregisterHost, OnUnregisterHost)
+    IPC_MESSAGE_HANDLER(AppCacheHostMsg_SetSpawningHostId, OnSetSpawningHostId)
     IPC_MESSAGE_HANDLER(AppCacheHostMsg_GetResourceList, OnGetResourceList)
     IPC_MESSAGE_HANDLER(AppCacheHostMsg_SelectCache, OnSelectCache)
     IPC_MESSAGE_HANDLER(AppCacheHostMsg_SelectCacheForWorker,
@@ -101,6 +102,14 @@
   }
 }
 
+void AppCacheDispatcherHost::OnSetSpawningHostId(
+    int host_id, int spawning_host_id) {
+  if (appcache_service_.get()) {
+    if (!backend_impl_.SetSpawningHostId(host_id, spawning_host_id))
+      BadMessageReceived();
+  }
+}
+
 void AppCacheDispatcherHost::OnSelectCache(
     int host_id, const GURL& document_url,
     int64 cache_document_was_loaded_from,