Revert of Adds associated interface support to IPC::Channel

ipc/ipc_message_pipe_reader.cc

Index: ipc/ipc_message_pipe_reader.cc
diff --git a/ipc/ipc_message_pipe_reader.cc b/ipc/ipc_message_pipe_reader.cc
index 74c72858fcd179b8389583a85619b3eccb7dab19..da2d85d981abfe184f99d31ca264d9239656e4fe 100644
--- a/ipc/ipc_message_pipe_reader.cc
+++ b/ipc/ipc_message_pipe_reader.cc
@@ -115,14 +115,6 @@
   return result == MOJO_RESULT_OK;
 }
 
-void MessagePipeReader::GetRemoteInterface(
-    const std::string& name,
-    mojo::ScopedInterfaceEndpointHandle handle) {
-  mojom::GenericInterfaceAssociatedRequest request;
-  request.Bind(std::move(handle));
-  sender_->GetAssociatedInterface(name, std::move(request));
-}
-
 void MessagePipeReader::Receive(
     mojo::Array<uint8_t> data,
     mojo::Array<mojom::SerializedHandlePtr> handles) {
@@ -146,14 +138,6 @@
   delegate_->OnMessageReceived(message);
 }
 
-void MessagePipeReader::GetAssociatedInterface(
-    const mojo::String& name,
-    mojom::GenericInterfaceAssociatedRequest request) {
-  DCHECK(thread_checker_.CalledOnValidThread());
-  if (delegate_)
-    delegate_->OnAssociatedInterfaceRequest(name, request.PassHandle());
-}
-
 void MessagePipeReader::OnPipeError(MojoResult error) {
   DCHECK(thread_checker_.CalledOnValidThread());
   if (delegate_)