Really disable test when running with optimize for size

test/cctest/test-spaces.cc

 // Copyright 2011 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 454 matching lines @@
   v8::internal::AllocationResult allocation =
       space->AllocateRaw(new_linear_size);
   v8::internal::FreeListNode* node =
       v8::internal::FreeListNode::cast(allocation.ToObjectChecked());
   node->set_size(space->heap(), new_linear_size);
 }
 
 
 UNINITIALIZED_TEST(NewSpaceGrowsToTargetCapacity) {
   FLAG_target_semi_space_size = 2;
-  FLAG_optimize_for_size = false;
+  if (FLAG_optimize_for_size) return;
 
   v8::Isolate* isolate = v8::Isolate::New();
   {
     v8::Isolate::Scope isolate_scope(isolate);
     v8::HandleScope handle_scope(isolate);
     v8::Context::New(isolate)->Enter();
 
     Isolate* i_isolate = reinterpret_cast<Isolate*>(isolate);
 
     NewSpace* new_space = i_isolate->heap()->new_space();
@@ skipping 15 matching lines @@
 
       // Turn the allocation into a proper object so isolate teardown won't
       // crash.
       v8::internal::FreeListNode* node =
           v8::internal::FreeListNode::cast(allocation.ToObjectChecked());
       node->set_size(new_space->heap(), 80);
     }
   }
   isolate->Dispose();
 }