Migrate RenderProcessHost, ChildThread to InterfaceRegistry/Provider

content/child/child_thread_impl.h

Index: content/child/child_thread_impl.h
diff --git a/content/child/child_thread_impl.h b/content/child/child_thread_impl.h
index 0438b9cfe40126da4c92fc436e80882a0a92e8a4..1ca22473af0e79fe55861880ed6af5aa256e4c8f 100644
--- a/content/child/child_thread_impl.h
+++ b/content/child/child_thread_impl.h
@@ -96,6 +96,8 @@ class CONTENT_EXPORT ChildThreadImpl
 #endif
   void RecordAction(const base::UserMetricsAction& action) override;
   void RecordComputedAction(const std::string& action) override;
+  shell::InterfaceRegistry* GetInterfaceRegistry() override;
+  shell::InterfaceProvider* GetRemoteInterfaces() override;
 
   IPC::SyncChannel* channel() { return channel_.get(); }
 
@@ -195,14 +197,6 @@ class CONTENT_EXPORT ChildThreadImpl
   static void ShutdownThread();
 #endif
 
-  shell::InterfaceRegistry* interface_registry() {
-    return mojo_application_->interface_registry();
-  }
-
-  shell::InterfaceProvider* remote_interfaces() const {
-    return mojo_application_->remote_interfaces();
-  }
-
  protected:
   friend class ChildProcess;