[Extensions] Add Windows API test coverage

This CL adds test coverage for WINDOWS_CREATE and WINDOWS_GETALL APIs.

Bug: 1093066
Change-Id: I750a4689af252e167bcedf419143deaca712269f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2436410
Commit-Queue: Ghazale Hosseinabadi <ghazale@chromium.org>
Reviewed-by: David Bertoni <dbertoni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#811971}

chrome/browser/extensions/service_worker_apitest.cc

@@ -403,6 +403,22 @@ IN_PROC_BROWSER_TEST_F(ServiceWorkerBasedBackgroundTest, TabsExecuteScript) {
       << message_;
 }
 
+// Tests chrome.windows APIs.
+IN_PROC_BROWSER_TEST_F(ServiceWorkerBasedBackgroundTest, WindowsBasic) {
+  base::HistogramTester histogram_tester;
+  ASSERT_TRUE(
+      RunExtensionTest("service_worker/worker_based_background/windows_basic"))
+      << message_;
+  // Extension should issue one chrome.windows.create call and two
+  // chrome.windows.getAll, verify that we logged histogram for it.
+  EXPECT_EQ(1, histogram_tester.GetBucketCount(
+                   "Extensions.Functions.ExtensionServiceWorkerCalls",
+                   functions::HistogramValue::WINDOWS_CREATE));
+  EXPECT_EQ(2, histogram_tester.GetBucketCount(
+                   "Extensions.Functions.ExtensionServiceWorkerCalls",
+                   functions::HistogramValue::WINDOWS_GETALL));
+}
+
 // Tests chrome.webRequest APIs.
 IN_PROC_BROWSER_TEST_F(ServiceWorkerBasedBackgroundTest, WebRequest) {
   ASSERT_TRUE(

chrome/test/data/extensions/api_test/service_worker/worker_based_background/windows_basic/manifest.json

+{
+  "name": "Service Worker-based background script",
+  "version": "0.1",
+  "manifest_version": 2,
+  "description": "Test windows APIs for service worker-based background scripts.",
+  "permissions": ["tabs"],
+  "background": {"service_worker": "service_worker_background.js"}
+}

chrome/test/data/extensions/api_test/service_worker/worker_based_background/windows_basic/service_worker_background.js

+// Copyright 2020 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.
+
+var createWindowUtil = function(urlToLoad, createdCallback) {
+  try {
+    chrome.windows.create({ 'url': urlToLoad, 'type': 'normal',
+        'width': 600, 'height': 400 }, function(window) {
+      createdCallback({width: window.width, height: window.height});
+    });
+  } catch (e) {
+    chrome.test.fail(e);
+  }
+}
+
+var getAllWindowUtil = function(populateValue, getAllCallback) {
+  try {
+    chrome.windows.getAll({populate: populateValue}, function(window) {
+      getAllCallback({length: window.length});
+    });
+  } catch (e) {
+    chrome.test.fail(e);
+  }
+}
+
+chrome.test.runTests([
+  // Get the window that was automatically created.
+  function testWindowGetBeforeCreate() {
+    var populateValue = true;
+    getAllWindowUtil(populateValue, function(windowData) {
+      chrome.test.assertEq(1, windowData.length);
+      chrome.test.succeed();
+    });
+  },
+  // Create a new window.
+  function testWindowCreate() {
+    createWindowUtil('blank.html', function(windowData) {
+      chrome.test.assertEq(600, windowData.width);
+      chrome.test.assertEq(400, windowData.height);
+      chrome.test.succeed();
+    });
+  },
+  // Check that the created window exists.
+  function testWindowGetAfterCreate() {
+    var populateValue = true;
+    getAllWindowUtil(populateValue, function(windowData) {
+      chrome.test.assertEq(2, windowData.length);
+      chrome.test.succeed();
+    });
+  },
+]);