Allow MessageFilters to restrict listening to specific message classes

content/browser/appcache/appcache_dispatcher_host.cc

Index: content/browser/appcache/appcache_dispatcher_host.cc
diff --git a/content/browser/appcache/appcache_dispatcher_host.cc b/content/browser/appcache/appcache_dispatcher_host.cc
index 2ce0d83290f183c95e7fa8e674706d937350cdb8..7d8af58bb3036d1f44c5f735eb8f43dd704c4896 100644
--- a/content/browser/appcache/appcache_dispatcher_host.cc
+++ b/content/browser/appcache/appcache_dispatcher_host.cc
@@ -11,11 +11,18 @@
 #include "content/public/browser/user_metrics.h"
 
 namespace content {
+namespace {
+const uint32 kFilteredMessageClasses[] = {
+  AppCacheMsgStart
+};
+}  // namespace
 
 AppCacheDispatcherHost::AppCacheDispatcherHost(
     ChromeAppCacheService* appcache_service,
     int process_id)
-    : appcache_service_(appcache_service),
+    : BrowserMessageFilter(
+          kFilteredMessageClasses, arraysize(kFilteredMessageClasses)),
+      appcache_service_(appcache_service),
       frontend_proxy_(this),
       process_id_(process_id) {
 }