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 d131fcfeda66f94e6b210cfc78dea4c7548a5985..b890db4328f44f57b4c540b42142f1ba174885af 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;
@@ -390,10 +389,6 @@ class PLATFORM_EXPORT ThreadState {
     Vector<size_t> deadSize;
   };
 
-  void pushThreadLocalWeakCallback(void*, WeakCallback);
-  bool popAndInvokeThreadLocalWeakCallback(Visitor*);
-  void threadLocalWeakProcessing();
-
   size_t objectPayloadSizeForTesting();
 
   void shouldFlushHeapDoesNotContainCache() {
@@ -666,8 +661,6 @@ 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>;