Enable TurboFan deopts for test-heap/NextCodeLinkIsWeak.

test/cctest/test-heap.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 4032 matching lines @@
   while (code->next_code_link()->IsCode()) {
     result++;
     code = Code::cast(code->next_code_link());
   }
   return result;
 }
 
 
 TEST(NextCodeLinkIsWeak) {
   i::FLAG_allow_natives_syntax = true;
+  i::FLAG_turbo_deoptimization = true;
   CcTest::InitializeVM();
   Isolate* isolate = CcTest::i_isolate();
   v8::internal::Heap* heap = CcTest::heap();
 
   if (!isolate->use_crankshaft()) return;
   HandleScope outer_scope(heap->isolate());
   Handle<Code> code;
   heap->CollectAllAvailableGarbage();
   int code_chain_length_before, code_chain_length_after;
   {
@@ skipping 415 matching lines @@
 #ifdef DEBUG
 TEST(PathTracer) {
   CcTest::InitializeVM();
   v8::HandleScope scope(CcTest::isolate());
 
   v8::Local<v8::Value> result = CompileRun("'abc'");
   Handle<Object> o = v8::Utils::OpenHandle(*result);
   CcTest::i_isolate()->heap()->TracePathToObject(*o);
 }
 #endif  // DEBUG