Mandoline: Move ContentHandlerConnection into separate file

mojo/shell/content_handler_connection.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 MOJO_SHELL_CONTENT_HANDLER_CONNECTION_H_
+#define MOJO_SHELL_CONTENT_HANDLER_CONNECTION_H_
+
+#include <string>
+
+#include "mojo/application/public/interfaces/content_handler.mojom.h"
+#include "mojo/public/cpp/bindings/error_handler.h"
+#include "url/gurl.h"
+
+namespace mojo {
+namespace shell {
+
+class ApplicationManager;
+
+// A ContentHandlerConnection is responsible for creating and maintaining a
+// connection to an app which provides the ContentHandler service.
+// A ContentHandlerConnection can only be destroyed via CloseConnection.
+// A ContentHandlerConnection manages its own lifetime and cannot be used with
+// a scoped_ptr to avoid reentrant calls into ApplicationManager late in
+// destruction.
+class ContentHandlerConnection : public ErrorHandler {
+ public:
+  ContentHandlerConnection(ApplicationManager* manager,
+                           const GURL& content_handler_url,
+                           const GURL& requestor_url,
+                           const std::string& qualifier);
+
+  // Closes the connection and destorys |this| object.
+  void CloseConnection();
+
+  ContentHandler* content_handler() { return content_handler_.get(); }
+  const GURL& content_handler_url() { return content_handler_url_; }
+  const std::string& content_handler_qualifier() {
+    return content_handler_qualifier_;
+  }
+
+ private:
+  ~ContentHandlerConnection() override;
+
+  // ErrorHandler implementation:
+  void OnConnectionError() override;
+
+  ApplicationManager* manager_;
+  GURL content_handler_url_;
+  std::string content_handler_qualifier_;
+  ContentHandlerPtr content_handler_;
+  bool connection_closed_;
+
+  DISALLOW_COPY_AND_ASSIGN(ContentHandlerConnection);
+};
+
+}  // namespace shell
+}  // namespace mojo
+
+#endif  // MOJO_SHELL_CONTENT_HANDLER_CONNECTION_H_