IPC: Make ChannelReader inherit from SupportsAttachmentBrokering.

ipc/ipc_channel_nacl.cc

Index: ipc/ipc_channel_nacl.cc
diff --git a/ipc/ipc_channel_nacl.cc b/ipc/ipc_channel_nacl.cc
index f5b33cea41adc83a4035eb0d3d64db124a3a972f..19a32891af1ab95f9393e2702f3082373f43fc4d 100644
--- a/ipc/ipc_channel_nacl.cc
+++ b/ipc/ipc_channel_nacl.cc
@@ -122,13 +122,15 @@ void ChannelNacl::ReaderThreadRunner::Run() {
 
 ChannelNacl::ChannelNacl(const IPC::ChannelHandle& channel_handle,
                          Mode mode,
-                         Listener* listener)
+                         Listener* listener,
+                         AttachmentBroker* broker)
     : ChannelReader(listener),
       mode_(mode),
       waiting_connect_(true),
       pipe_(-1),
       pipe_name_(channel_handle.name),
-      weak_ptr_factory_(this) {
+      weak_ptr_factory_(this),
+      broker_(broker) {
   if (!CreatePipe(channel_handle)) {
     // The pipe may have been closed already.
     const char *modestr = (mode_ & MODE_SERVER_FLAG) ? "server" : "client";
@@ -217,6 +219,10 @@ bool ChannelNacl::Send(Message* message) {
   return true;
 }
 
+AttachmentBroker* ChannelNacl::GetAttachmentBroker() {
+  return broker_;
+}
+
 void ChannelNacl::DidRecvMsg(scoped_ptr<MessageContents> contents) {
   // Close sets the pipe to -1. It's possible we'll get a buffer sent to us from
   // the reader thread after Close is called. If so, we ignore it.
@@ -372,10 +378,12 @@ void ChannelNacl::HandleInternalMessage(const Message& msg) {
 // Channel's methods
 
 // static
-scoped_ptr<Channel> Channel::Create(
-    const IPC::ChannelHandle &channel_handle, Mode mode, Listener* listener) {
+scoped_ptr<Channel> Channel::Create(const IPC::ChannelHandle& channel_handle,
+                                    Mode mode,
+                                    Listener* listener,
+                                    AttachmentBroker* broker) {
   return scoped_ptr<Channel>(
-      new ChannelNacl(channel_handle, mode, listener));
+      new ChannelNacl(channel_handle, mode, listener, broker));
 }
 
 }  // namespace IPC