Defer Mojo interface binding in the gpu process until OnInitialize

services/shell/public/cpp/interface_registry.h

 // 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.
 
 #ifndef SERVICES_SHELL_PUBLIC_CPP_INTERFACE_REGISTRY_H_
 #define SERVICES_SHELL_PUBLIC_CPP_INTERFACE_REGISTRY_H_
 
 #include <memory>
 
 #include "base/memory/ptr_util.h"
@@ skipping 86 matching lines @@
       const base::Callback<void(mojo::ScopedMessagePipeHandle)>& callback,
       const scoped_refptr<base::SingleThreadTaskRunner>& task_runner =
           nullptr);
 
   template <typename Interface>
   void RemoveInterface() {
     RemoveInterface(Interface::Name_);
   }
   void RemoveInterface(const std::string& name);
 
+  // Temporarily prevent incoming interface requests from being bound. Incoming
+  // requests will be queued internally and dispatched once UnpauseBinding() is
+  // called.
+  void PauseBinding();
+
+  // Resumes incoming interface request binding.
+  void ResumeBinding();
+
  private:
   using NameToInterfaceBinderMap =
       std::map<std::string, std::unique_ptr<InterfaceBinder>>;
 
   // mojom::InterfaceProvider:
   void GetInterface(const mojo::String& interface_name,
                     mojo::ScopedMessagePipeHandle handle) override;
 
   // Returns true if the binder was set, false if it was not set (e.g. by
   // some filtering policy preventing this interface from being exposed).
   bool SetInterfaceBinderForName(std::unique_ptr<InterfaceBinder> binder,
                                  const std::string& name);
 
+  mojom::InterfaceProviderRequest pending_request_;
+
   mojo::Binding<mojom::InterfaceProvider> binding_;
   Connection* connection_;
 
   NameToInterfaceBinderMap name_to_binder_;
 
   base::WeakPtrFactory<InterfaceRegistry> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(InterfaceRegistry);
 };
 
 }  // namespace shell
 
 #endif  // SERVICES_SHELL_PUBLIC_CPP_INTERFACE_REGISTRY_H_