3D Compositing in <browser>, first draft.

ipc/ipc_forwarding_message_filter.h

Index: ipc/ipc_forwarding_message_filter.h
diff --git a/ipc/ipc_forwarding_message_filter.h b/ipc/ipc_forwarding_message_filter.h
index 5b404c504675636849627cf45474b154d3a9a954..719592526736e18c530917c93835b665c04b5866 100644
--- a/ipc/ipc_forwarding_message_filter.h
+++ b/ipc/ipc_forwarding_message_filter.h
@@ -45,6 +45,8 @@ class IPC_EXPORT ForwardingMessageFilter : public ChannelProxy::MessageFilter {
   void AddRoute(int routing_id);
   void RemoveRoute(int routing_id);
 
+  void SetPredicate(base::Callback<bool(const Message&)> predicate);

[scshunt, 2012/08/12 01:42:45]

Need to switch to the virtual design suggested by Nat.

[scshunt, 2012/08/17 17:30:28]

Done, except I didn't actually use virtual functions because a callback was far
cleaner.

+
   // ChannelProxy::MessageFilter methods:
   virtual bool OnMessageReceived(const Message& message) OVERRIDE;
 
@@ -67,6 +69,8 @@ class IPC_EXPORT ForwardingMessageFilter : public ChannelProxy::MessageFilter {
   // Indicates the routing_ids for which messages should be filtered.
   std::set<int> routes_;
 
+  base::Callback<bool(const Message&)> predicate_;
+
   DISALLOW_COPY_AND_ASSIGN(ForwardingMessageFilter);
 };