/**
 * Copyright 2017 Google Inc. All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

var Browser = require('./lib/Browser');
var Page = require('./lib/Page');
var fs = require('fs');
var browser = new Browser();

browser.newPage().then(async page => {
    await page.navigate('http://example.com');
    var screenshotBuffer = await page.screenshot(Page.ScreenshotTypes.PNG);
    fs.writeFileSync('example.png', screenshotBuffer);
    browser.close();
});

@@ -631,24 +631,25 @@
 = require('.
+.
 /lib/Browser
@@ -656,66 +656,8 @@
 ');%0A
-var Page = require('./lib/Page');%0Avar fs = require('fs');%0A
 var 
@@ -776,132 +776,47 @@
     
-var screenshotBuffer = await page.screenshot(Page.ScreenshotTypes.PNG);%0A    fs.writeFileSync('example.png', screenshotBuffer
+await page.saveScreenshot('example.png'
 );%0A 

Update examples/screenshot.js to use Page.saveScreenshot