Tried using CrossThreadPersistent for workerDebuggerAgents

Source/core/inspector/InspectorDebuggerAgent.h

Index: Source/core/inspector/InspectorDebuggerAgent.h
diff --git a/Source/core/inspector/InspectorDebuggerAgent.h b/Source/core/inspector/InspectorDebuggerAgent.h
index 004b019b3975d398b0b3b38fb0028b7f0717dbe5..e8306031263eaac52f96182ca79db9375bbe98af 100644
--- a/Source/core/inspector/InspectorDebuggerAgent.h
+++ b/Source/core/inspector/InspectorDebuggerAgent.h
@@ -71,7 +71,8 @@ class XMLHttpRequest;
 typedef String ErrorString;
 
 class InspectorDebuggerAgent : public InspectorBaseAgent<InspectorDebuggerAgent>, public ScriptDebugListener, public InspectorBackendDispatcher::DebuggerCommandHandler {
-    WTF_MAKE_NONCOPYABLE(InspectorDebuggerAgent); WTF_MAKE_FAST_ALLOCATED;
+    WTF_MAKE_NONCOPYABLE(InspectorDebuggerAgent);
+    WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED;
 public:
     enum BreakpointSource {
         UserBreakpointSource,