IPC: Make ChannelReader inherit from SupportsAttachmentBrokering.

ipc/ipc_channel_factory.cc

Index: ipc/ipc_channel_factory.cc
diff --git a/ipc/ipc_channel_factory.cc b/ipc/ipc_channel_factory.cc
index c8431c091c8ba87b13f8f5d08caac3f28fd47a03..ac050855cfcf37fe7ce679aaf1a21c6eb0835eb9 100644
--- a/ipc/ipc_channel_factory.cc
+++ b/ipc/ipc_channel_factory.cc
@@ -11,21 +11,22 @@ 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);
 };
@@ -33,9 +34,11 @@ class PlatformChannelFactory : public ChannelFactory {
 } // 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