Allow MessageFilters to restrict listening to specific message classes

content/browser/service_worker/service_worker_dispatcher_host.cc

Index: content/browser/service_worker/service_worker_dispatcher_host.cc
diff --git a/content/browser/service_worker/service_worker_dispatcher_host.cc b/content/browser/service_worker/service_worker_dispatcher_host.cc
index 8710ee96a0911ae54699a8ce2d65b3a50cd51885..162047ccb9ad4fdd7d11cea917394bd086320027 100644
--- a/content/browser/service_worker/service_worker_dispatcher_host.cc
+++ b/content/browser/service_worker/service_worker_dispatcher_host.cc
@@ -24,13 +24,20 @@ const char kDisabledErrorMessage[] =
 const char kDomainMismatchErrorMessage[] =
     "Scope and scripts do not have the same origin";
 
+const uint32 kFilteredMessageClasses[] = {
+  ServiceWorkerMsgStart,
+  EmbeddedWorkerMsgStart,
+};
+
 }  // namespace
 
 namespace content {
 
 ServiceWorkerDispatcherHost::ServiceWorkerDispatcherHost(
     int render_process_id)
-    : render_process_id_(render_process_id) {
+    : BrowserMessageFilter(
+          kFilteredMessageClasses, arraysize(kFilteredMessageClasses)),
+      render_process_id_(render_process_id) {
 }
 
 ServiceWorkerDispatcherHost::~ServiceWorkerDispatcherHost() {