Fix a number of tests that incorrectly used assertUnreachable.

test/mjsunit/object-literal.js

Index: test/mjsunit/object-literal.js
diff --git a/test/mjsunit/object-literal.js b/test/mjsunit/object-literal.js
index 397d67064409fe4a66635c913a288c6531151f7b..5dcbb3bc7c9c08d52bbe192904f104dddfbbdd44 100644
--- a/test/mjsunit/object-literal.js
+++ b/test/mjsunit/object-literal.js
@@ -141,11 +141,14 @@ var keywords = [
 ];
 
 function testKeywordProperty(keyword) {
+  var exception = false;
   try {
     // Sanity check that what we get is a keyword.
     eval("var " + keyword + " = 42;");
-    assertUnreachable("Not a keyword: " + keyword);
-  } catch (e) { }
+  } catch (e) {
+    exception = true;
+  }
+  assertTrue(exception);
 
   // Simple property, read and write.
   var x = eval("({" + keyword + ": 42})");
@@ -187,4 +190,4 @@ function testKeywordProperty(keyword) {
 
 for (var i = 0; i < keywords.length; i++) {
   testKeywordProperty(keywords[i]);
-}
+}