Initial native keyboard proof of concept.

services/keyboard_native/keyboard_service_impl.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.
+
+#include "base/memory/scoped_ptr.h"
+#include "base/memory/scoped_vector.h"
+#include "base/memory/weak_ptr.h"
+#include "mojo/common/weak_binding_set.h"
+#include "mojo/public/cpp/application/application_connection.h"
+#include "mojo/public/cpp/application/application_delegate.h"
+#include "mojo/public/cpp/application/application_runner.h"
+#include "mojo/public/cpp/application/interface_factory.h"
+#include "mojo/public/cpp/bindings/interface_request.h"
+#include "mojo/public/cpp/bindings/strong_binding.h"
+#include "mojo/services/keyboard/public/interfaces/keyboard.mojom.h"
+
+namespace keyboard {
+
+class KeyboardServiceDelegate : public mojo::ApplicationDelegate,
+    public mojo::InterfaceFactory<KeyboardService> {
+ public:
+  // ApplicationDelegate implementation.
+  bool ConfigureIncomingConnection(mojo::ApplicationConnection* connection)
+      override;
+
+  // From InterfaceFactory<Echo>

[jamesr, 2015/05/08 20:55:16]

I like the comments but please be consistent

[APW, 2015/05/08 22:09:28]

Done.

+  void Create(mojo::ApplicationConnection* connection,
+              mojo::InterfaceRequest<KeyboardService> request) override;
+};
+
+class KeyboardServiceImpl : public KeyboardService {
+ public:
+  KeyboardServiceImpl();
+  ~KeyboardServiceImpl() override;
+
+  // KeyboardService implementation.
+  void Show(KeyboardClientPtr client) override;
+  void ShowByRequest() override;
+  void Hide() override;
+};
+
+class StrongBindingKeyboardServiceImpl : public KeyboardServiceImpl {

[jamesr, 2015/05/08 20:55:16]

I don't really understand what this class does - it doesn't appear to have any
overrides? what it is its purpose in life?

[APW, 2015/05/08 22:09:28]

examples/echo/echo_server.c uses this pattern, that's where I got it from.  You
think it's unnecessary?

[APW, 2015/05/08 22:27:02]

Done.

+ public:
+  explicit StrongBindingKeyboardServiceImpl(
+      mojo::InterfaceRequest<KeyboardService> handle)
+      : strong_binding_(this, handle.Pass()) {
+  }
+
+ private:
+  mojo::StrongBinding<KeyboardService> strong_binding_;
+};
+
+}  // namespace keyboard