setForcedForTesting 1316 Source/platform/heap/Heap.cpp         ThreadState::current()->setForcedForTesting(true);
setForcedForTesting  539 Source/platform/heap/ThreadState.cpp         setForcedForTesting(false);
setForcedForTesting  287 Source/platform/heap/ThreadState.h     void setForcedForTesting(bool);