IPC: Make ChannelReader inherit from SupportsAttachmentBrokering.

ipc/ipc_channel_factory.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ipc/ipc_channel_factory.h"
 
 namespace IPC {
 
 namespace {
 
 class PlatformChannelFactory : public ChannelFactory {
  public:
   PlatformChannelFactory(ChannelHandle handle,
-                         Channel::Mode mode)
-      : handle_(handle), mode_(mode) {
-  }
+                         Channel::Mode mode,
+                         AttachmentBroker* broker)
+      : handle_(handle), mode_(mode), broker_(broker) {}
 
   std::string GetName() const override {
     return handle_.name;
   }
 
   scoped_ptr<Channel> BuildChannel(Listener* listener) override {
-    return Channel::Create(handle_, mode_, listener);
+    return Channel::Create(handle_, mode_, listener, broker_);
   }
 
  private:
   ChannelHandle handle_;
   Channel::Mode mode_;
+  AttachmentBroker* broker_;
 
   DISALLOW_COPY_AND_ASSIGN(PlatformChannelFactory);
 };
 
 } // namespace
 
 // static
-scoped_ptr<ChannelFactory> ChannelFactory::Create(
-    const ChannelHandle& handle, Channel::Mode mode) {
-  return scoped_ptr<ChannelFactory>(new PlatformChannelFactory(handle, mode));
+scoped_ptr<ChannelFactory> ChannelFactory::Create(const ChannelHandle& handle,
+                                                  Channel::Mode mode,
+                                                  AttachmentBroker* broker) {
+  return scoped_ptr<ChannelFactory>(
+      new PlatformChannelFactory(handle, mode, broker));
 }
 
 }  // namespace IPC