Allow MessageFilters to restrict listening to specific message classes

content/browser/renderer_host/p2p/socket_dispatcher_host.cc

Index: content/browser/renderer_host/p2p/socket_dispatcher_host.cc
diff --git a/content/browser/renderer_host/p2p/socket_dispatcher_host.cc b/content/browser/renderer_host/p2p/socket_dispatcher_host.cc
index 7e9b835b4e8dc987e1eee4f485fe8a2d2506f8d1..f74d8bfd275e021d068fc904e53194a105fe705e 100644
--- a/content/browser/renderer_host/p2p/socket_dispatcher_host.cc
+++ b/content/browser/renderer_host/p2p/socket_dispatcher_host.cc
@@ -21,9 +21,16 @@ using content::BrowserMessageFilter;
 using content::BrowserThread;
 
 namespace content {
+namespace {
 
 const size_t kMaximumPacketSize = 32768;
 
+const uint32 kFilteredMessageClasses[] = {
+  P2PMsgStart,
+};
+
+}  // namespace
+
 class P2PSocketDispatcherHost::DnsRequest {
  public:
   typedef base::Callback<void(const net::IPAddressList&)> DoneCallback;
@@ -96,7 +103,9 @@ class P2PSocketDispatcherHost::DnsRequest {
 P2PSocketDispatcherHost::P2PSocketDispatcherHost(
     content::ResourceContext* resource_context,
     net::URLRequestContextGetter* url_context)
-    : resource_context_(resource_context),
+    : BrowserMessageFilter(
+          kFilteredMessageClasses, arraysize(kFilteredMessageClasses)),
+      resource_context_(resource_context),
       url_context_(url_context),
       monitoring_networks_(false) {
 }