[turbofan] Enable deoptimization for non-asm.js TurboFan code.

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 4376 matching lines @@
     result++;
     code = Code::cast(code->next_code_link());
   }
   return result;
 }
 
 
 TEST(NextCodeLinkIsWeak) {
   i::FLAG_always_opt = false;
   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 1144 matching lines @@
   size_t counter2 = 2000;
   tracer->SampleNewSpaceAllocation(time2, counter2);
   size_t bytes = tracer->NewSpaceAllocatedBytesInLast(1000);
   CHECK_EQ(0, bytes);
   int time3 = 1000;
   size_t counter3 = 30000;
   tracer->SampleNewSpaceAllocation(time3, counter3);
   bytes = tracer->NewSpaceAllocatedBytesInLast(100);
   CHECK_EQ((counter3 - counter1) * 100 / (time3 - time1), bytes);
 }