Implement Object.prototype.hasOwnProperty in generated code.

test/mjsunit/has-own-property.js

Index: test/mjsunit/has-own-property.js
diff --git a/test/mjsunit/has-own-property.js b/test/mjsunit/has-own-property.js
index 5ff8db5f7b02fc1ee224c3de6a09d7a5dcd7a0e5..518d39f91c3144d0641065b9a187950714487a52 100644
--- a/test/mjsunit/has-own-property.js
+++ b/test/mjsunit/has-own-property.js
@@ -36,3 +36,49 @@ assertTrue(Object.prototype.hasOwnProperty.call('', 'length'));
 // Check for numbers.
 assertFalse((123).hasOwnProperty('length'));
 assertFalse(Object.prototype.hasOwnProperty.call(123, 'length'));
+
+var o = {foo:0, bar:1};
+assertTrue(o.hasOwnProperty("foo"));
+assertTrue(o.hasOwnProperty("fo" + "o"));
+assertTrue(o.hasOwnProperty("bar"));
+assertTrue(o.hasOwnProperty("b" + "ar"));
+assertFalse(o.hasOwnProperty("baz"));
+assertFalse(o.hasOwnProperty("ba" + "z"));
+assertFalse(o.hasOwnProperty("b" + "az"));
+
+var longString = "a";
+for (var i = 0; i < 65535; i++) {
+  longString += String.fromCharCode(i);
+}
+for (var i = 0; i < 65535; i++) {
+  longString.charCodeAt(i);
+}
+var strings = [];
+var symbols = [];
+var o = {};
+for (var i = 0; i < 100; i++) {
+  strings[i] = "foo" + i;
+  symbols[i] = eval("'" + strings[i] + "'");
+  o[symbols[i]] = 0;
+}
+for (var i = 0; i < 100; i++) {
+  assertTrue(o.hasOwnProperty(strings[i]));
+  assertTrue(o.hasOwnProperty(symbols[i]));
+  assertFalse(o.hasOwnProperty(symbols[i] + "x"));
+  assertFalse(o.hasOwnProperty(strings[i] + "x"));
+  assertFalse(o.hasOwnProperty(i));
+  assertFalse(o.hasOwnProperty(longString));
+}
+o = {};
+for (var i = 0; i < 100; i++) {
+  strings[i] = "foo" + i;
+  o[strings[i]] = 0;
+}
+for (var i = 0; i < 100; i++) {
+  assertTrue(o.hasOwnProperty(strings[i]));
+  assertTrue(o.hasOwnProperty(symbols[i]));
+  assertFalse(o.hasOwnProperty(symbols[i] + "x"));
+  assertFalse(o.hasOwnProperty(strings[i] + "x"));
+  assertFalse(o.hasOwnProperty(i));
+  assertFalse(o.hasOwnProperty(longString));
+}