Make browser process a singleton service

services/service_manager/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/service_manager/public/cpp/interface_registry.h"
 
 #include <iterator>
 #include <sstream>
 
 #include "base/memory/ptr_util.h"
@@ skipping 165 matching lines @@
   DCHECK(interface_names);
   for (auto& entry : name_to_binder_)
     interface_names->insert(entry.first);
 }
 
 void InterfaceRegistry::AddConnectionLostClosure(
     const base::Closure& connection_lost_closure) {
   connection_lost_closures_.push_back(connection_lost_closure);
 }
 
+void InterfaceRegistry::BindInterface(const std::string& name,
+                                      mojo::ScopedMessagePipeHandle handle) {
+  // NOTE: We don't expose GetInterface() publicly so as to avoid confusion
+  // with local and remote binding requests.
+  GetInterface(name, std::move(handle));
+}
+
 // mojom::InterfaceProvider:
 void InterfaceRegistry::GetInterface(const std::string& interface_name,
                                      mojo::ScopedMessagePipeHandle handle) {
   if (is_paused_) {
     pending_interface_requests_.emplace(interface_name, std::move(handle));
     return;
   }
 
   if (CanBindRequestForInterface(interface_name)) {
     auto iter = name_to_binder_.find(interface_name);
@@ skipping 56 matching lines @@
       exposed_interfaces_.size() == 1 && exposed_interfaces_.count("*") == 1;
 }
 
 void InterfaceRegistry::OnConnectionError() {
   std::list<base::Closure> closures = connection_lost_closures_;
   for (const auto& closure : closures)
     closure.Run();
 }
 
 }  // namespace service_manager