Revert of Eliminate ChildThread InterfaceRegistry.

content/public/child/child_thread.h

 // Copyright 2015 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.
 
 #ifndef CONTENT_PUBLIC_CHILD_CHILD_THREAD_H_
 #define CONTENT_PUBLIC_CHILD_CHILD_THREAD_H_
 
 #include <string>
 
 #include "base/logging.h"
 #include "build/build_config.h"
 #include "content/common/content_export.h"
 #include "ipc/ipc_sender.h"
 
 #if defined(OS_WIN)
 #include <windows.h>
 #endif
 
 namespace base {
 struct UserMetricsAction;
 }
 
 namespace service_manager {
 class Connector;
+class InterfaceRegistry;
 }
 
 namespace content {
 
 class ServiceManagerConnection;
 
 // An abstract base class that contains logic shared between most child
 // processes of the embedder.
 class CONTENT_EXPORT ChildThread : public IPC::Sender {
  public:
@@ skipping 28 matching lines @@
 
   // Sends over a string to be recorded by user metrics as a computed action.
   // When you use this you need to also update the rules for extracting known
   // actions in chrome/tools/extract_actions.py.
   virtual void RecordComputedAction(const std::string& action) = 0;
 
   // Returns the ServiceManagerConnection for the thread (from which a
   // service_manager::Connector can be obtained).
   virtual ServiceManagerConnection* GetServiceManagerConnection() = 0;
 
+  // Returns the InterfaceRegistry that this process uses to expose interfaces
+  // to the browser.
+  virtual service_manager::InterfaceRegistry* GetInterfaceRegistry() = 0;
+
   // Returns a connector that can be used to bind interfaces exposed by other
   // services.
   virtual service_manager::Connector* GetConnector() = 0;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_CHILD_CHILD_THREAD_H_