Add getter properties to array entry previews

test/inspector/runtime/evaluate-with-generate-preview.js

+// Copyright 2016 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+print("Tests that Runtime.evaluate will generate correct previews.");
+
+InspectorTest.addScript(
+`
+Object.prototype[0] = 'default-first';
+var obj = {p1: {a:1}, p2: {b:'foo'}};
+Object.defineProperties(obj, {
+  p3: {
+    get() { return 2 }
+  },
+  p4: {
+    set(x) { return x }
+  },
+  p5: {
+    get() { return 2 },
+    set(x) { return x }
+  }
+});
+
+Array.prototype[0] = 'default-first';
+var arr = [,, 1, [2]];
+Object.defineProperties(arr, {
+  4: {
+    get() { return 2 }
+  },
+  5: {
+    set(x) { return x }
+  },
+  6: {
+    get() { return 2 },
+    set(x) { return x }
+  }
+});
+`);
+
+InspectorTest.runTestSuite([
+  function testObjectPropertiesPreview(next)
+  {
+    Protocol.Runtime.evaluate({ "expression": "obj", "generatePreview": true })
+        .then(result => InspectorTest.logMessage(result.result.result.preview))
+        .then(next);
+  },
+
+  function testArrayPropertiesPreview(next)
+  {
+    Protocol.Runtime.evaluate({ "expression": "arr", "generatePreview": true })
+        .then(result => InspectorTest.logMessage(result.result.result.preview))
+        .then(next);
+  }
+]);