Remove associated interface registration from ChannelProxy

content/common/associated_interface_registry_impl.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 "content/common/associated_interface_registry_impl.h"
 
 #include <utility>
 
 #include "base/logging.h"
 
 namespace content {
 
 AssociatedInterfaceRegistryImpl::AssociatedInterfaceRegistryImpl() {}
 
 AssociatedInterfaceRegistryImpl::~AssociatedInterfaceRegistryImpl() {}
 
+bool AssociatedInterfaceRegistryImpl::CanBindRequest(
+    const std::string& interface_name) const {
+  return interfaces_.find(interface_name) != interfaces_.end();
+}
+
 void AssociatedInterfaceRegistryImpl::BindRequest(
     const std::string& interface_name,
     mojo::ScopedInterfaceEndpointHandle handle) {
   auto it = interfaces_.find(interface_name);
   if (it == interfaces_.end())
     return;
   it->second.Run(std::move(handle));
 }
 
 void AssociatedInterfaceRegistryImpl::AddInterface(const std::string& name,
                                                    const Binder& binder) {
   auto result = interfaces_.insert(std::make_pair(name, binder));
   DCHECK(result.second);
 }
 
 void AssociatedInterfaceRegistryImpl::RemoveInterface(const std::string& name) {
   auto it = interfaces_.find(name);
   DCHECK(it != interfaces_.end());
   interfaces_.erase(it);
 }
 
 }  // namespace content