Tweak bitcoin handler to new api

Auditors: @bridiver

Fix #3625

Test Plan: Test that bitcoin handler still works.  Backup your Brave appdata user dir. Remove it. Make sure you can successfully register a bitcoin handler.

Author: bbondy

app/ledger.js

@@ -27,7 +27,6 @@ const util = require('util')
 const electron = require('electron')
 const app = electron.app
 const ipc = electron.ipcMain
-const protocolHandler = electron.protocol
 const session = electron.session
 
 const acorn = require('acorn')
@@ -159,10 +158,11 @@ var boot = () => {
  */
 
 if (ipc) {
-  ipc.on(messages.CHECK_BITCOIN_HANDLER, () => {
+  ipc.on(messages.CHECK_BITCOIN_HANDLER, (event, partition) => {
+    const protocolHandler = session.fromPartition(partition).protocol
     // TODO: https://github.com/brave/browser-laptop/issues/3625
     if (typeof protocolHandler.isNavigatorProtocolHandled === 'function') {
-      ledgerInfo.hasBitcoinHandler = protocolHandler.isNavigatorProtocolHandled('', 'bitcoin')
+      ledgerInfo.hasBitcoinHandler = protocolHandler.isNavigatorProtocolHandled('bitcoin')
       appActions.updateLedgerInfo(underscore.omit(ledgerInfo, [ '_internal' ]))
     }
   })

js/components/frame.js

@@ -76,7 +76,7 @@ class Frame extends ImmutableComponent {
   updateAboutDetails () {
     let location = getBaseUrl(this.props.location)
     if (location === 'about:preferences') {
-      ipc.send(messages.CHECK_BITCOIN_HANDLER)
+      ipc.send(messages.CHECK_BITCOIN_HANDLER, FrameStateUtil.getPartition(this.frame))
       const ledgerData = this.props.ledgerInfo.merge(this.props.publisherInfo).toJS()
       this.webview.send(messages.LEDGER_UPDATED, ledgerData)
       this.webview.send(messages.SETTINGS_UPDATED, this.props.settings ? this.props.settings.toJS() : null)