Fix automation API bounding boxes on high-dpi devices

chrome/test/data/extensions/api_test/automation/tests/location_scaled/location_scaled.js

+// Copyright 2017 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 assertTrue = chrome.test.assertTrue;
+
+var EventType = chrome.automation.EventType;
+
+// These tests are run with a device scale factor of 2.0, but all of the
+// coordinates we get from the automation API should be with no device
+// scale factor applied.
+//
+// Note that internally, the device scale factor is applied to web trees,
+// but not to the desktop tree, so we want to make sure that that's properly
+// taken into account when converting from relative coordinates to global
+// device-independent coordinates.
+var allTests = [
+  function testLocationInWebView() {
+    rootNode.addEventListener(EventType.LOAD_COMPLETE, function() {
+      var firstButton = rootNode.find({ attributes: { name: 'First' } });
+      var secondButton = rootNode.find({ attributes: { name: 'Second' } });
+      if (firstButton && secondButton) {
+        var firstRect = firstButton.location;
+        var secondRect = secondButton.location;
+
+        // The first button should be at (50, 150) with a size of (200, 100).
+        // Allow one pixel off for rounding errors.
+        assertTrue(Math.abs(firstRect.left - 50) <= 1);
+        assertTrue(Math.abs(firstRect.top - 150) <= 1);
+        assertTrue(Math.abs(firstRect.width - 200) <= 1);
+        assertTrue(Math.abs(firstRect.height - 100) <= 1);
+
+        // The second button should be exactly 225 x 25 pixels offset from
+        // the first button.
+        assertTrue(Math.abs(secondRect.left - firstRect.left - 225) <= 1);
+        assertTrue(Math.abs(secondRect.top - firstRect.top - 25) <= 1);
+        assertTrue(Math.abs(secondRect.width - 200) <= 1);
+        assertTrue(Math.abs(secondRect.height - 100) <= 1);
+        chrome.test.succeed();
+      }
+    }, false);
+
+    chrome.app.window.create('buttons.html', {
+      'innerBounds': {
+        'left': 50,
+        'top': 150,
+        'width': 400,
+        'height': 400
+      }
+    });
+  }
+];
+
+chrome.automation.getDesktop(function(rootNodeArg) {
+  window.rootNode = rootNodeArg;
+  chrome.test.runTests(allTests);
+});