Rename C++ SonarPlugin class

Summary: Part of sonar -> flipper rename

Reviewed By: passy

Differential Revision: D9917615

fbshipit-source-id: e59f43bf003d30ae6be4d95bc4a21c92ab39f732

xplat/Flipper/FlipperPlugin.h

@@ -0,0 +1,42 @@
+/*
+ *  Copyright (c) 2018-present, Facebook, Inc.
+ *
+ *  This source code is licensed under the MIT license found in the LICENSE
+ *  file in the root directory of this source tree.
+ *
+ */
+#pragma once
+
+#include "FlipperConnection.h"
+#include <string>
+
+namespace facebook {
+namespace flipper {
+
+class FlipperPlugin {
+ public:
+  virtual ~FlipperPlugin() {}
+
+  /**
+  The plugin's identifier. This should map to a javascript plugin
+  with the same identifier to ensure messages are sent correctly.
+  */
+  virtual std::string identifier() const = 0;
+
+  /**
+  Called when a connection has been established between this plugin
+  and the corresponding plugin on the Flipper desktop app. The provided
+  connection can be used to register method receivers as well as send
+  messages back to the desktop app.
+  */
+  virtual void didConnect(std::shared_ptr<FlipperConnection> conn) = 0;
+
+  /**
+  Called when a plugin has been disconnected and the FlipperConnection
+  provided in didConnect is no longer valid to use.
+  */
+  virtual void didDisconnect() = 0;
+};
+
+} // namespace flipper
+} // namespace facebook