Use FrameTreeNode ID as frameId in extension APIs

chrome/test/data/extensions/api_test/messaging/connect_crash/test.js

+// 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.
+
+chrome.runtime.onConnect.addListener(function(port) {
+  var is_ready_to_crash = false;
+  var succeed1 = chrome.test.callbackAdded();
+  var succeed2 = chrome.test.callbackAdded();
+
+  port.onMessage.addListener(function(msg) {
+    chrome.test.assertEq('is_ready_to_crash', msg);
+    is_ready_to_crash = true;
+    chrome.test.sendMessage('ready_to_crash');
+    // Now the browser test should kill the tab, and the port should be closed.
+  });
+  port.onDisconnect.addListener(function() {
+    console.log('port.onDisconnect was triggered.');

[Devlin, 2015/12/10 21:53:06]

chrome.test.log

[robwu, 2015/12/11 00:53:47]

Done.

+    chrome.test.assertTrue(is_ready_to_crash);
+    succeed1();
+  });
+
+  chrome.tabs.sendMessage(port.sender.tab.id, 'Rob says hi', function() {
+    console.log('tab.sendMessage\'s response callback was invoked');
+    chrome.test.assertNoLastError();
+    succeed2();
+  });
+});