Add a mimeHandler extension API.

extensions/browser/api/mime_handler_private/mime_handler_private.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.
+
+#ifndef EXTENSIONS_BROWSER_API_MIME_HANDLER_PRIVATE_MIME_HANDLER_PRIVATE_H_
+#define EXTENSIONS_BROWSER_API_MIME_HANDLER_PRIVATE_MIME_HANDLER_PRIVATE_H_
+
+#include "base/memory/weak_ptr.h"
+#include "extensions/common/api/mime_handler.mojom.h"
+
+namespace extensions {
+class StreamContainer;
+
+class MimeHandlerServiceImpl
+    : public mojo::InterfaceImpl<mime_handler::MimeHandlerService> {
+ public:
+  static void Create(
+      base::WeakPtr<StreamContainer> stream_container,
+      mojo::InterfaceRequest<mime_handler::MimeHandlerService> request);
+
+ private:
+  explicit MimeHandlerServiceImpl(
+      base::WeakPtr<StreamContainer> stream_container);
+  ~MimeHandlerServiceImpl() override;
+
+  // mime_handler::MimeHandlerService overrides.
+  void GetStreamInfo(const mojo::Callback<void(mime_handler::StreamInfoPtr)>&
+                         callback) override;
+  void AbortStream(const mojo::Callback<void()>& callback) override;
+
+  // Invoked by the callback used to abort |stream_|.
+  void OnStreamClosed(const mojo::Callback<void()>& callback);
+
+  // A handle to the stream being handled by the MimeHandlerViewGuest.
+  base::WeakPtr<StreamContainer> stream_;
+
+  base::WeakPtrFactory<MimeHandlerServiceImpl> weak_factory_;
+};
+
+}  // namespace extensions
+
+namespace mojo {
+
+template <>
+struct TypeConverter<extensions::mime_handler::StreamInfoPtr,
+                     extensions::StreamContainer> {
+  static extensions::mime_handler::StreamInfoPtr Convert(
+      const extensions::StreamContainer& stream);
+};
+
+}  // namespace mojo
+
+#endif  // EXTENSIONS_BROWSER_API_MIME_HANDLER_PRIVATE_MIME_HANDLER_PRIVATE_H_