Fix test-random test.

BUG=
TEST=

Review URL: https://chromiumcodereview.appspot.com/9616006

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10942 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

test/cctest/test-random.cc

@@ -91,7 +91,7 @@ TEST(CrankshaftRandom) {
   // Optimize function.
   Execution::Call(fun, global, 0, NULL, &has_pending_exception);
   Execution::Call(fun, global, 0, NULL, &has_pending_exception);
-  fun->MarkForLazyRecompilation();
+  if (!fun->IsOptimized()) fun->MarkForLazyRecompilation();
 
   // Test with some random values.
   TestSeeds(fun, context, 0xC0C0AFFE, 0x31415926);