Allow MessageFilters to restrict listening to specific message classes

content/browser/renderer_host/socket_stream_dispatcher_host.cc

Index: content/browser/renderer_host/socket_stream_dispatcher_host.cc
diff --git a/content/browser/renderer_host/socket_stream_dispatcher_host.cc b/content/browser/renderer_host/socket_stream_dispatcher_host.cc
index 204bf8e32838bf922f1b3f63498a0654be6969d2..d38bd91b46194ed1ef431249699961901245cb7a 100644
--- a/content/browser/renderer_host/socket_stream_dispatcher_host.cc
+++ b/content/browser/renderer_host/socket_stream_dispatcher_host.cc
@@ -26,13 +26,19 @@ namespace {
 
 const size_t kMaxSocketStreamHosts = 16 * 1024;
 
+const uint32 kFilteredMessageClasses[] = {
+  SocketStreamMsgStart,
+};
+
 }  // namespace
 
 SocketStreamDispatcherHost::SocketStreamDispatcherHost(
     int render_process_id,
     const GetRequestContextCallback& request_context_callback,
     ResourceContext* resource_context)
-    : render_process_id_(render_process_id),
+    : BrowserMessageFilter(
+          kFilteredMessageClasses, arraysize(kFilteredMessageClasses)),
+      render_process_id_(render_process_id),
       request_context_callback_(request_context_callback),
       resource_context_(resource_context),
       weak_ptr_factory_(this),