Revert of [ic] Experiment: disable map-specific handler cache.

test/cctest/test-code-cache.cc

Index: test/cctest/test-code-cache.cc
diff --git a/test/cctest/test-code-cache.cc b/test/cctest/test-code-cache.cc
index 5618af6576036bbe37767fb3e254c30ff1dd32fe..b0f020d960d459bfcd22aba6b300fe37ea3c4f59 100644
--- a/test/cctest/test-code-cache.cc
+++ b/test/cctest/test-code-cache.cc
@@ -40,9 +40,6 @@
 }  // namespace
 
 TEST(CodeCache) {
-  // TODO(ishell): Experiment: don't cache handlers in map-specific code cache.
-  return;
-
   CcTest::InitializeVM();
   Isolate* isolate = CcTest::i_isolate();
   Factory* factory = isolate->factory();