Skip test for optimized code sharing if flag is disabled by default.

test/cctest/test-compiler.cc

Index: test/cctest/test-compiler.cc
diff --git a/test/cctest/test-compiler.cc b/test/cctest/test-compiler.cc
index 5e7935c4abec8cfcafa3e182f986469cce5dbabd..ac08800948ff63481d5083bf060640e73c1aed47 100644
--- a/test/cctest/test-compiler.cc
+++ b/test/cctest/test-compiler.cc
@@ -355,6 +355,9 @@ TEST(GetScriptLineNumber) {
 // Test that optimized code for different closures is actually shared
 // immediately by the FastNewClosureStub when run in the same context.
 TEST(OptimizedCodeSharing) {
+  // Skip test if --cache-optimized-code is not activated by default because
+  // FastNewClosureStub that is baked into the snapshot is incorrect.
+  if (!FLAG_cache_optimized_code) return;
   FLAG_allow_natives_syntax = true;
   InitializeVM();
   v8::HandleScope scope;