Remove thread-local weak processing

third_party/WebKit/Source/platform/heap/ThreadState.h

Index: third_party/WebKit/Source/platform/heap/ThreadState.h
diff --git a/third_party/WebKit/Source/platform/heap/ThreadState.h b/third_party/WebKit/Source/platform/heap/ThreadState.h
index 2b7e8588170274dd9b87275c36ee3451dd86cc79..82c9934c2e3f2b3ed0e776c1319bdde581804633 100644
--- a/third_party/WebKit/Source/platform/heap/ThreadState.h
+++ b/third_party/WebKit/Source/platform/heap/ThreadState.h
@@ -54,7 +54,6 @@ class Isolate;
 namespace blink {
 
 class BasePage;
-class CallbackStack;
 class GarbageCollectedMixinConstructorMarker;
 class PersistentNode;
 class PersistentRegion;
@@ -186,9 +185,7 @@ class PLATFORM_EXPORT ThreadState {
   static ThreadState* fromObject(const void*);
 
   bool isMainThread() const { return this == mainThreadState(); }
-#if DCHECK_IS_ON()
   bool checkThread() const { return m_thread == currentThread(); }
-#endif
 
   ThreadHeap& heap() const { return *m_heap; }
 
@@ -389,10 +386,6 @@ class PLATFORM_EXPORT ThreadState {
     Vector<size_t> deadSize;
   };
 
-  void pushThreadLocalWeakCallback(void*, WeakCallback);
-  bool popAndInvokeThreadLocalWeakCallback(Visitor*);
-  void threadLocalWeakProcessing();
-
   size_t objectPayloadSizeForTesting();
 
   void shouldFlushHeapDoesNotContainCache() {
@@ -664,8 +657,6 @@ class PLATFORM_EXPORT ThreadState {
   bool m_shouldFlushHeapDoesNotContainCache;
   GCState m_gcState;
 
-  std::unique_ptr<CallbackStack> m_threadLocalWeakCallbackStack;
-
   using PreFinalizerCallback = bool (*)(void*);
   using PreFinalizer = std::pair<void*, PreFinalizerCallback>;