Implemented stub ShareService mojo service, for navigator.share.

chrome/browser/webshare/share_service_impl.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 CHROME_BROWSER_WEBSHARE_SHARE_SERVICE_IMPL_H_
+#define CHROME_BROWSER_WEBSHARE_SHARE_SERVICE_IMPL_H_
+
+#include "mojo/public/cpp/bindings/interface_request.h"
+#include "mojo/public/cpp/bindings/strong_binding.h"
+#include "third_party/WebKit/public/platform/modules/webshare/webshare.mojom.h"
+#include "url/gurl.h"
+
+// Desktop implementation of the ShareService service defined in
+// third_party/WebKit/public/platform/modules/webshare/webshare.mojom.

[Matt Giuca, 2016/12/08 06:42:56]

Don't think this is necessary (a code search will show where
blink::mojom::ShareService is found if it isn't obvious from the #includes).

Unless this is idiomatic for Mojo subclasses?

[constantina, 2016/12/09 02:24:14]

Done.

+class ShareServiceImpl : public blink::mojom::ShareService {
+ public:
+  explicit ShareServiceImpl(blink::mojom::ShareServiceRequest request);
+  ~ShareServiceImpl() override;
+
+  static void Create(mojo::InterfaceRequest<ShareService> request);
+
+  void Share(const std::string& title,
+             const std::string& text,
+             const GURL& url,
+             const ShareCallback& callback) override;
+
+ private:
+  mojo::Binding<blink::mojom::ShareService> binding_;
+};
+
+#endif  // CHROME_BROWSER_WEBSHARE_SHARE_SERVICE_IMPL_H_