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diff --git a/chromium/mojo/public/cpp/bindings/lib/interface_impl_internal.h b/chromium/mojo/public/cpp/bindings/lib/interface_impl_internal.h
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index 00000000000..f2cc4f0c5b6
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+++ b/chromium/mojo/public/cpp/bindings/lib/interface_impl_internal.h
@@ -0,0 +1,94 @@
+// Copyright 2014 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 MOJO_PUBLIC_CPP_BINDINGS_LIB_INTERFACE_IMPL_INTERNAL_H_
+#define MOJO_PUBLIC_CPP_BINDINGS_LIB_INTERFACE_IMPL_INTERNAL_H_
+
+#include "mojo/public/cpp/bindings/error_handler.h"
+#include "mojo/public/cpp/bindings/interface_ptr.h"
+#include "mojo/public/cpp/bindings/lib/filter_chain.h"
+#include "mojo/public/cpp/bindings/lib/message_header_validator.h"
+#include "mojo/public/cpp/environment/environment.h"
+#include "mojo/public/cpp/system/macros.h"
+
+namespace mojo {
+namespace internal {
+
+template <typename Interface>
+class InterfaceImplBase : public Interface {
+ public:
+  virtual ~InterfaceImplBase() {}
+  virtual void OnConnectionEstablished() = 0;
+  virtual void OnConnectionError() = 0;
+};
+
+template <typename Interface>
+class InterfaceImplState : public ErrorHandler {
+ public:
+  typedef typename Interface::Client Client;
+
+  explicit InterfaceImplState(InterfaceImplBase<Interface>* instance)
+      : router_(NULL),
+        proxy_(NULL) {
+    assert(instance);
+    stub_.set_sink(instance);
+  }
+
+  virtual ~InterfaceImplState() {
+    delete proxy_;
+    if (router_) {
+      router_->set_error_handler(NULL);
+      delete router_;
+    }
+  }
+
+  void BindProxy(
+      InterfacePtr<Interface>* ptr,
+      const MojoAsyncWaiter* waiter = Environment::GetDefaultAsyncWaiter()) {
+    MessagePipe pipe;
+    ptr->Bind(pipe.handle0.Pass(), waiter);
+    Bind(pipe.handle1.Pass(), waiter);
+  }
+
+  void Bind(ScopedMessagePipeHandle handle,
+            const MojoAsyncWaiter* waiter) {
+    assert(!router_);
+
+    FilterChain filters;
+    filters.Append<MessageHeaderValidator>();
+    filters.Append<typename Interface::RequestValidator_>();
+    filters.Append<typename Interface::Client::ResponseValidator_>();
+
+    router_ = new Router(handle.Pass(), filters.Pass(), waiter);
+    router_->set_incoming_receiver(&stub_);
+    router_->set_error_handler(this);
+
+    proxy_ = new typename Client::Proxy_(router_);
+
+    instance()->OnConnectionEstablished();
+  }
+
+  Router* router() { return router_; }
+  Client* client() { return proxy_; }
+
+ private:
+  InterfaceImplBase<Interface>* instance() {
+    return static_cast<InterfaceImplBase<Interface>*>(stub_.sink());
+  }
+
+  virtual void OnConnectionError() MOJO_OVERRIDE {
+    instance()->OnConnectionError();
+  }
+
+  Router* router_;
+  typename Client::Proxy_* proxy_;
+  typename Interface::Stub_ stub_;
+
+  MOJO_DISALLOW_COPY_AND_ASSIGN(InterfaceImplState);
+};
+
+}  // namespace internal
+}  // namespace mojo
+
+#endif  // MOJO_PUBLIC_CPP_BINDINGS_LIB_INTERFACE_IMPL_INTERNAL_H_