Add support for attaching filters to an IPC TestSink.

ipc/ipc_test_sink.cc

Index: ipc/ipc_test_sink.cc
diff --git a/ipc/ipc_test_sink.cc b/ipc/ipc_test_sink.cc
index 95900b6ca5074a164b45491431ffc7e86e5e9b66..bf25d30029072854db9e9a0177d8b54461082a28 100644
--- a/ipc/ipc_test_sink.cc
+++ b/ipc/ipc_test_sink.cc
@@ -22,6 +22,7 @@ bool TestSink::Send(Message* message) {
 
 bool TestSink::OnMessageReceived(const Message& msg) {
   messages_.push_back(Message(msg));
+  FOR_EACH_OBSERVER(Observer, observer_list_, OnMessageReceived(msg));
   return true;
 }
 
@@ -57,4 +58,12 @@ const Message* TestSink::GetUniqueMessageMatching(uint32 id) const {
   return &messages_[found_index];
 }
 
+void TestSink::AddObserver(Observer* obs) {
+  observer_list_.AddObserver(obs);
+}
+
+void TestSink::RemoveObserver(Observer* obs) {
+  observer_list_.RemoveObserver(obs);

[noelutz, 2011/01/28 02:13:06]

Maybe check in the destructor that all observers have been removed?

[Brian Ryner, 2011/01/28 02:19:59]

I'm not sure how common this is for observer interfaces in Chrome -- Brett?

+}
+
 }  // namespace IPC