Tried using CrossThreadPersistent for workerDebuggerAgents

Source/core/inspector/CodeGeneratorInstrumentation.py

Index: Source/core/inspector/CodeGeneratorInstrumentation.py
diff --git a/Source/core/inspector/CodeGeneratorInstrumentation.py b/Source/core/inspector/CodeGeneratorInstrumentation.py
index c31371766163373f9e931040a4b25fb3a24b68cd..2d4ada8732fead8dde9915653a5624035ac553ad 100755
--- a/Source/core/inspector/CodeGeneratorInstrumentation.py
+++ b/Source/core/inspector/CodeGeneratorInstrumentation.py
@@ -115,6 +115,7 @@ template_instrumenting_agents_h = string.Template("""// Code generated from Insp
 #ifndef InstrumentingAgentsInl_h
 #define InstrumentingAgentsInl_h
 
+#include "platform/heap/Handle.h"
 #include "wtf/FastAllocBase.h"
 #include "wtf/Noncopyable.h"
 #include "wtf/PassRefPtr.h"
@@ -124,15 +125,16 @@ namespace WebCore {
 
 ${forward_list}
 
-class InstrumentingAgents : public RefCounted<InstrumentingAgents> {
+class InstrumentingAgents : public RefCountedWillBeGarbageCollectedFinalized<InstrumentingAgents> {
     WTF_MAKE_NONCOPYABLE(InstrumentingAgents);
-    WTF_MAKE_FAST_ALLOCATED;
+    WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED;
 public:
-    static PassRefPtr<InstrumentingAgents> create()
+    static PassRefPtrWillBeRawPtr<InstrumentingAgents> create()
     {
-        return adoptRef(new InstrumentingAgents());
+        return adoptRefWillBeNoop(new InstrumentingAgents());
     }
     ~InstrumentingAgents() { }
+    void trace(Visitor*);
     void reset();
 
 ${accessor_list}
@@ -158,6 +160,11 @@ InstrumentingAgents::InstrumentingAgents()
 {
 }
 
+void InstrumentingAgents::trace(Visitor* visitor)
+{
+    $trace_list
+}
+
 void InstrumentingAgents::reset()
 {
     $reset_list
@@ -440,6 +447,7 @@ def generate_instrumenting_agents(used_agents):
     accessor_list = []
     member_list = []
     init_list = []
+    trace_list = []
     reset_list = []
 
     for agent in agents:
@@ -452,14 +460,16 @@ def generate_instrumenting_agents(used_agents):
             class_name=class_name,
             getter_name=getter_name,
             member_name=member_name))
-        member_list.append("    %s* %s;" % (class_name, member_name))
-        init_list.append("%s(0)" % member_name)
-        reset_list.append("%s = 0;" % member_name)
+        member_list.append("    RawPtrWillBeMember<%s> %s;" % (class_name, member_name))
+        init_list.append("%s(nullptr)" % member_name)
+        trace_list.append("visitor->trace(%s);" % member_name)
+        reset_list.append("%s = nullptr;" % member_name)
 
     forward_list.sort()
     accessor_list.sort()
     member_list.sort()
     init_list.sort()
+    trace_list.sort()
     reset_list.sort()
 
     header_lines = template_instrumenting_agents_h.substitute(
@@ -471,6 +481,7 @@ def generate_instrumenting_agents(used_agents):
     cpp_lines = template_instrumenting_agents_cpp.substitute(
         None,
         init_list="\n    , ".join(init_list),
+        trace_list="\n    ".join(trace_list),
         reset_list="\n    ".join(reset_list))
 
     return header_lines, cpp_lines