Separate out IPC::Message::Sender and channel::Listener into a separate class.

ipc/ipc_fuzzing_tests.cc

Index: ipc/ipc_fuzzing_tests.cc
diff --git a/ipc/ipc_fuzzing_tests.cc b/ipc/ipc_fuzzing_tests.cc
index aa1fa5f7d6a0d93ef67752c9cb6ea8d13f31b830..fc01d78d9f457c5edce5fa4ce0623aa709a4c4a0 100644
--- a/ipc/ipc_fuzzing_tests.cc
+++ b/ipc/ipc_fuzzing_tests.cc
@@ -115,15 +115,15 @@ TEST(IPCMessageIntegrity, ReadVectorTooLarge2) {
   EXPECT_FALSE(ReadParam(&m, &iter, &vec));
 }
 
-class SimpleListener : public IPC::Channel::Listener {
+class SimpleListener : public IPC::ChannelListener {
  public:
   SimpleListener() : other_(NULL) {
   }
-  void Init(IPC::Message::Sender* s) {
+  void Init(IPC::MessageSender* s) {
     other_ = s;
   }
  protected:
-  IPC::Message::Sender* other_;
+  IPC::MessageSender* other_;
 };
 
 enum {