Change RenderFrame to use InterfaceRegistry et al.

services/shell/public/cpp/lib/interface_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/shell/public/cpp/interface_registry.h"
 
 #include "services/shell/public/cpp/connection.h"
 
 namespace shell {
 
 InterfaceRegistry::InterfaceRegistry(Connection* connection)
-    : binding_(this), connection_(connection) {}
+    : binding_(this), connection_(connection), weak_factory_(this) {}
 InterfaceRegistry::~InterfaceRegistry() {}
 
 void InterfaceRegistry::Bind(
     mojom::InterfaceProviderRequest local_interfaces_request) {
   DCHECK(!binding_.is_bound());
   binding_.Bind(std::move(local_interfaces_request));
 }
 
+base::WeakPtr<InterfaceRegistry> InterfaceRegistry::GetWeakPtr() {
+  return weak_factory_.GetWeakPtr();
+}
+
 void InterfaceRegistry::RemoveInterface(const std::string& name) {
   auto it = name_to_binder_.find(name);
   if (it != name_to_binder_.end())
     name_to_binder_.erase(it);
 }
 
 // mojom::InterfaceProvider:
 void InterfaceRegistry::GetInterface(const mojo::String& interface_name,
                                      mojo::ScopedMessagePipeHandle handle) {
   auto iter = name_to_binder_.find(interface_name);
@@ skipping 13 matching lines @@
   if (!connection_ ||
       (connection_ && connection_->AllowsInterface(interface_name))) {
     RemoveInterface(interface_name);
     name_to_binder_[interface_name] = std::move(binder);
     return true;
   }
   return false;
 }
 
 }  // namespace shell