Migrate RenderFrameImpl to use BinderRegistry.

services/service_manager/public/cpp/lib/binder_registry.cc

 // Copyright 2016 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 "services/service_manager/public/cpp/binder_registry.h"
 
 #include "services/service_manager/public/cpp/identity.h"
 
 namespace service_manager {
 
-BinderRegistry::BinderRegistry() {}
+BinderRegistry::BinderRegistry() : weak_factory_(this) {}
 BinderRegistry::~BinderRegistry() {}
 
 void BinderRegistry::AddInterface(
     const std::string& interface_name,
     const base::Callback<void(mojo::ScopedMessagePipeHandle)>& callback,
     const scoped_refptr<base::SingleThreadTaskRunner>& task_runner) {
   SetInterfaceBinder(
       interface_name,
       base::MakeUnique<internal::GenericCallbackBinder>(callback, task_runner));
 }
@@ skipping 15 matching lines @@
     mojo::ScopedMessagePipeHandle interface_pipe) {
   auto it = binders_.find(interface_name);
   if (it != binders_.end()) {
     it->second->BindInterface(remote_identity, interface_name,
                               std::move(interface_pipe));
   } else {
     LOG(ERROR) << "Failed to locate a binder for interface: " << interface_name;
   }
 }
 
+base::WeakPtr<BinderRegistry> BinderRegistry::GetWeakPtr() {
+  return weak_factory_.GetWeakPtr();
+}
+
 void BinderRegistry::SetInterfaceBinder(
     const std::string& interface_name,
     std::unique_ptr<InterfaceBinder> binder) {
   RemoveInterface(interface_name);
   binders_[interface_name] = std::move(binder);
 }
 
 }  // namespace service_manager