Implement "appinstalled" event on Android.

chrome/renderer/installation_service_impl.h

+// Copyright 2016 The Chromium Authors. All rights reserved.

[dominickn, 2016/10/12 22:35:09]

Adding new code in chrome/renderer is frowned upon. Can this get routed straight
to Blink in some way? Possibly after my CL?

[Matt Giuca, 2016/12/09 04:36:48]

Done.

+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROME_RENDERER_INSTALLATION_SERVICE_IMPL_H_
+#define CHROME_RENDERER_INSTALLATION_SERVICE_IMPL_H_
+
+#include "third_party/WebKit/public/platform/modules/installation/installation.mojom.h"
+
+namespace content {
+class RenderFrame;
+}  // namespace content
+
+class InstallationServiceImpl : public blink::mojom::InstallationService {
+ public:
+  explicit InstallationServiceImpl(content::RenderFrame* render_frame);
+
+  static void Create(content::RenderFrame* render_frame,
+                     blink::mojom::InstallationServiceRequest request);
+
+  void OnInstall() override;
+
+ private:
+  content::RenderFrame* render_frame_;
+};
+
+#endif  // CHROME_RENDERER_INSTALLATION_SERVICE_IMPL_H_