Back out "JS apps support 1/n"

Summary:
Original commit changeset: 56d1ca1a60ed

This broke Android support in some instances. We haven't had a chance to investigate this yet, but this should cleanly reapply, so we can figure out what happened after the release.

Reviewed By: cekkaewnumchai

Differential Revision: D18688590

fbshipit-source-id: ff84080d43fa481cc8c8c669a76aed15d0f8aa56

static/SupportJSClientPreload.js

@@ -1,90 +0,0 @@
-/**
- * Copyright (c) Facebook, Inc. and its affiliates.
- *
- * This source code is licensed under the MIT license found in the
- * LICENSE file in the root directory of this source tree.
- *
- * @format
- */
-
-// ==============
-// Preload script
-// ==============
-const {remote, ipcRenderer} = require('electron');
-
-let FlipperMainWindowId = 0;
-
-ipcRenderer.on('parent-window-id', (event, message) => {
-  FlipperMainWindowId = message;
-});
-
-let FlipperIsClientInit = false;
-let FlipperMemoizedPlugins;
-
-function initClient(plugins) {
-  if (FlipperIsClientInit) {
-    return;
-  }
-  if (plugins) {
-    FlipperMemoizedPlugins = plugins;
-  }
-  if (FlipperMainWindowId != 0) {
-    ipcRenderer.sendTo(FlipperMainWindowId, 'from-js-emulator-init-client', {
-      command: 'initClient',
-      windowId: remote.getCurrentWebContents().id,
-      payload: {
-        plugins: plugins ? plugins : FlipperMemoizedPlugins,
-        appName: 'kite/weblite',
-      },
-    });
-    FlipperIsClientInit = true;
-  }
-}
-
-window.FlipperWebviewBridge = {
-  registerPlugins: function(plugins) {
-    console.log(plugins);
-    if (FlipperMainWindowId != 0) {
-      ipcRenderer.sendTo(FlipperMainWindowId, 'from-js-emulator', {
-        command: 'registerPlugins',
-        payload: plugins,
-      });
-    }
-  },
-  start: function() {
-    console.log('start');
-
-    if (FlipperMainWindowId != 0) {
-      ipcRenderer.sendTo(FlipperMainWindowId, 'from-js-emulator', {
-        command: 'start',
-        payload: null,
-      });
-    }
-  },
-  sendFlipperObject: function(plugin, method, data) {
-    console.log(plugin, method, data);
-    initClient();
-    if (FlipperMainWindowId != 0) {
-      ipcRenderer.sendTo(FlipperMainWindowId, 'from-js-emulator', {
-        command: 'sendFlipperObject',
-        payload: {
-          api: plugin,
-          method: method,
-          params: data,
-        },
-      });
-    }
-  },
-  isFlipperSupported: true,
-  initClient: initClient,
-};
-
-ipcRenderer.on('message-to-plugin', (event, message) => {
-  const flipper = window.flipper;
-  if (!flipper) {
-    return;
-  }
-  const receiver = flipper.FlipperWebviewMessageReceiver.receive;
-  const {api, method, params} = message.params;
-  receiver(api, method, JSON.stringify(params));
-});