Decouple IPC::MessageFilter from IPC::Channel

ipc/message_filter.cc

Index: ipc/message_filter.cc
diff --git a/ipc/message_filter.cc b/ipc/message_filter.cc
index 72181263f0b761e801dbb71a5600da548f187a1f..f14566dc7a19748b51f9e04b37a02a2e12408a78 100644
--- a/ipc/message_filter.cc
+++ b/ipc/message_filter.cc
@@ -11,15 +11,15 @@ namespace IPC {
 
 MessageFilter::MessageFilter() {}
 
-void MessageFilter::OnFilterAdded(Channel* channel) {}
+void MessageFilter::OnFilterAdded(Sender* sender) {}
 
 void MessageFilter::OnFilterRemoved() {}
 
-void MessageFilter::OnChannelConnected(int32 peer_pid) {}
+void MessageFilter::OnSenderConnected() {}
 
-void MessageFilter::OnChannelError() {}
+void MessageFilter::OnSenderError() {}
 
-void MessageFilter::OnChannelClosing() {}
+void MessageFilter::OnSenderClosing() {}
 
 bool MessageFilter::OnMessageReceived(const Message& message) {
   return false;