IPC: Make ChannelReader inherit from SupportsAttachmentBrokering.

ipc/ipc_send_fds_test.cc

Index: ipc/ipc_send_fds_test.cc
diff --git a/ipc/ipc_send_fds_test.cc b/ipc/ipc_send_fds_test.cc
index 2328c30022151f675ced6b649a1f7fee317253ac..7669c8fd1cf72b7664e1a94ef7f9063cd9094a4e 100644
--- a/ipc/ipc_send_fds_test.cc
+++ b/ipc/ipc_send_fds_test.cc
@@ -149,8 +149,7 @@ int SendFdsClientCommon(const std::string& test_client_name,
 
   // Set up IPC channel.
   scoped_ptr<IPC::Channel> channel(IPC::Channel::CreateClient(
-      IPCTestBase::GetChannelName(test_client_name),
-      &listener));
+      IPCTestBase::GetChannelName(test_client_name), &listener, nullptr));
   CHECK(channel->Connect());
 
   // Run message loop.
@@ -245,10 +244,10 @@ class PipeChannelHelper {
 
   void Init() {
     IPC::ChannelHandle in_handle("IN");
-    in = IPC::Channel::CreateServer(in_handle, &null_listener_);
+    in = IPC::Channel::CreateServer(in_handle, &null_listener_, nullptr);
     IPC::ChannelHandle out_handle(
         "OUT", base::FileDescriptor(in->TakeClientFileDescriptor()));
-    out = IPC::Channel::CreateClient(out_handle, &cb_listener_);
+    out = IPC::Channel::CreateClient(out_handle, &cb_listener_, nullptr);
     // PostTask the connect calls to make sure the callbacks happens
     // on the right threads.
     in_thread_->task_runner()->PostTask(