Rename some appcache types in preparation for moving to content namespace

content/child/appcache/appcache_backend_proxy.cc

Index: content/child/appcache/appcache_backend_proxy.cc
diff --git a/content/child/appcache/appcache_backend_proxy.cc b/content/child/appcache/appcache_backend_proxy.cc
index 8f9d06a3912b172cd72e838b1ec9a800ae1695a7..1db2637d054de23b460d58e9468963dd89a8a185 100644
--- a/content/child/appcache/appcache_backend_proxy.cc
+++ b/content/child/appcache/appcache_backend_proxy.cc
@@ -54,8 +54,8 @@ void AppCacheBackendProxy::MarkAsForeignEntry(
                                     cache_document_was_loaded_from));
 }
 
-appcache::Status AppCacheBackendProxy::GetStatus(int host_id) {
-  appcache::Status status = appcache::UNCACHED;
+appcache::AppCacheStatus AppCacheBackendProxy::GetStatus(int host_id) {
+  appcache::AppCacheStatus status = appcache::UNCACHED;
   sender_->Send(new AppCacheHostMsg_GetStatus(host_id, &status));
   return status;
 }