- Removed the kWatchedBit and the associated weak property handling

runtime/vm/scavenger.h

Index: runtime/vm/scavenger.h
diff --git a/runtime/vm/scavenger.h b/runtime/vm/scavenger.h
index c5f2b8195361997d2e7ba4c12825ef22f515560b..5e7dcb1745d60db746cdf8980971db552a2ec2fc 100644
--- a/runtime/vm/scavenger.h
+++ b/runtime/vm/scavenger.h
@@ -233,6 +233,7 @@ class Scavenger {
   void IterateWeakReferences(Isolate* isolate, ScavengerVisitor* visitor);
   void IterateWeakRoots(Isolate* isolate, HandleVisitor* visitor);
   void ProcessToSpace(ScavengerVisitor* visitor);
+  void EnqueueWeakProperty(RawWeakProperty* raw_weak);
   uword ProcessWeakProperty(RawWeakProperty* raw_weak,
                             ScavengerVisitor* visitor);
   void Epilogue(Isolate* isolate, SemiSpace* from, bool invoke_api_callbacks);
@@ -264,7 +265,7 @@ class Scavenger {
   void UpdateMaxHeapCapacity();
   void UpdateMaxHeapUsage();
 
-  void ProcessWeakTables();
+  void ProcessWeakReferences();
 
   intptr_t NewSizeInWords(intptr_t old_size_in_words) const;
 
@@ -292,6 +293,9 @@ class Scavenger {
   // Keep track whether a scavenge is currently running.
   bool scavenging_;
 
+  // Keep track of pending weak properties discovered while scagenging.
+  RawWeakProperty* delayed_weak_properties_;
+
   int64_t gc_time_micros_;
   intptr_t collections_;
   static const int kStatsHistoryCapacity = 2;