Improve implementation of isInstanceOf in JSONSchemaValidator.

This does not update the docs because they have gotten badly
out of date. I will update them separately.

BUG=116490


Review URL: http://codereview.chromium.org/9584021

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@124835 0039d316-1c4b-4281-b951-d872f2087c98

chrome/common/extensions/api/extension.json

@@ -148,7 +148,7 @@
         "returns": {
           "type": "array",
           "description": "Array of global objects",
-          "items": { "type": "object", "isInstanceOf": "Window", "additionalProperties": { "type": "any" } }
+          "items": { "type": "object", "isInstanceOf": "global", "additionalProperties": { "type": "any" } }
         }
       },
       {
@@ -157,7 +157,7 @@
         "description": "Returns the JavaScript 'window' object for the background page running inside the current extension. Returns null if the extension has no background page.",
         "parameters": [],
         "returns": {
-          "type": "object", "isInstanceOf": "Window", "additionalProperties": { "type": "any" }
+          "type": "object", "isInstanceOf": "global", "additionalProperties": { "type": "any" }
          }
       },
       {
@@ -172,7 +172,7 @@
         "returns": {
           "type": "array",
           "description": "Array of global window objects",
-          "items": { "type": "object", "isInstanceOf": "Window", "additionalProperties": { "type": "any" } }
+          "items": { "type": "object", "isInstanceOf": "global", "additionalProperties": { "type": "any" } }
         }
       },
       {

chrome/common/extensions/docs/extension.html

@@ -542,7 +542,7 @@ For details, see
             </div><div class="apiItem">
               <a name="method-getBackgroundPage"></a> <!-- method-anchor -->
               <h4>getBackgroundPage</h4>
-              <div class="summary"><span>Window</span>
+              <div class="summary"><span>global</span>
                   <!-- Note: intentionally longer 80 columns -->
                   <span>chrome.extension.getBackgroundPage</span>()</div>
               <div class="description">
@@ -562,7 +562,7 @@ For details, see
                   (
                     <span id="typeTemplate">
                       <span>
-                        <span>Window</span>
+                        <span>global</span>
                       </span>
                     </span>
                   )
@@ -652,7 +652,7 @@ For details, see
             </div><div class="apiItem">
               <a name="method-getViews"></a> <!-- method-anchor -->
               <h4>getViews</h4>
-              <div class="summary"><span>array of Window</span>
+              <div class="summary"><span>array of global</span>
                   <!-- Note: intentionally longer 80 columns -->
                   <span>chrome.extension.getViews</span>(<span class="optional"><span>object</span>
                       <var><span>fetchProperties</span></var></span>)</div>
@@ -759,7 +759,7 @@ For details, see
                         <span>
                           array of <span><span>
                       <span>
-                        <span>Window</span>
+                        <span>global</span>
                       </span>
                     </span></span>
                         </span>

chrome/renderer/resources/extensions/json_schema.js

@@ -280,27 +280,10 @@ chromeHidden.JSONSchemaValidator.prototype.validateObject = function(
   // If "instanceof" property is set, check that this object inherits from
   // the specified constructor (function).
   if (schema.isInstanceOf) {
-    var isInstance = function() {
-      var constructor = this[schema.isInstanceOf];
-      if (constructor) {
-        return (instance instanceof constructor);
-      }
-
-      // Special-case constructors that can not always be found on the global
-      // object, but for which we to allow validation.
-      var allowedNamedConstructors = {
-        "Window": true,
-        "ImageData": true
-      }
-      if (!allowedNamedConstructors[schema.isInstanceOf]) {
-        throw "Attempt to validate against an instance ctor that could not be" +
-              "found: " + schema.isInstanceOf;
-      }
-      return (schema.isInstanceOf == instance.constructor.name)
-    }();
-
-    if (!isInstance)
+    if (Object.prototype.toString.call(instance) !=
+        "[object " + schema.isInstanceOf + "]") {
       this.addError(propPath, "notInstance", [schema.isInstanceOf]);
+    }
   }
 
   // Exit early from additional property check if "type":"any" is defined.

chrome/test/data/extensions/json_schema_test.js

-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Copyright (c) 2012 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.
 
@@ -167,16 +167,6 @@ function testExtends() {
   assertValid("", 43, schema);
 }
 
-function ClassA() {
-  this.a = "a";
-}
-function ClassB() {
-}
-ClassB.prototype = new ClassA();
-function ClassC() {
-  this.a = "a";
-}
-
 function testObject() {
   var schema = {
     properties: {
@@ -214,28 +204,6 @@ function testObject() {
   assertValid("Object", {foo:"foo", bar:undefined}, schema);
   assertNotValid("Object", {foo:"foo", bar:"42"}, schema,
                  [formatError("invalidType", ["integer", "string"])]);
-
-  var classASchema = {
-    properties: {
-      "a": { type: "string" }
-    },
-    isInstanceOf: "ClassA"
-  };
-
-  var classBSchema = {
-    properties: {},
-    isInstanceOf: "ClassB"
-  };
-
-  var a = new ClassA();
-  var b = new ClassB();
-  var c = new ClassC();
-
-  assertValid("Object", a, classASchema);
-  assertValid("Object", b, classBSchema);
-  assertValid("Object", b, classASchema);
-  assertNotValid("Object", c, classASchema,
-                 [formatError("notInstance", [classASchema.isInstanceOf])]);
 }
 
 function testTypeReference() {