Enable MinorGCUnmodifiedWrapperVisitor in workers

third_party/WebKit/Source/bindings/core/v8/V8GCController.cpp

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 227 matching lines @@
 {
     v8::HeapStatistics heapStatistics;
     isolate->GetHeapStatistics(&heapStatistics);
     return heapStatistics.used_heap_size();
 }
 
 namespace {
 
 void visitWeakHandlesForMinorGC(v8::Isolate* isolate)
 {
-    ASSERT(isMainThread());
     MinorGCUnmodifiedWrapperVisitor visitor(isolate);
     isolate->VisitWeakHandles(&visitor);
 }
 
 void objectGroupingForMajorGC(v8::Isolate* isolate, bool constructRetainedObjectInfos)
 {
     MajorGCWrapperVisitor visitor(isolate, constructRetainedObjectInfos);
     v8::V8::VisitHandlesWithClassIds(isolate, &visitor);
     visitor.notifyFinished();
 }
@@ skipping 24 matching lines @@
     }
 
     // TODO(haraken): It would be nice if the GC callbacks passed the Isolate
     // directly.
     v8::Isolate* isolate = v8::Isolate::GetCurrent();
     v8::HandleScope scope(isolate);
     switch (type) {
     case v8::kGCTypeScavenge:
         TRACE_EVENT_BEGIN1("devtools.timeline,v8", "MinorGC", "usedHeapSizeBefore", usedHeapSize(isolate));
         if (isMainThread()) {
-            {
-                TRACE_EVENT_SCOPED_SAMPLING_STATE("blink", "DOMMinorGC");
-                visitWeakHandlesForMinorGC(isolate);
-            }
+            TRACE_EVENT_SCOPED_SAMPLING_STATE("blink", "DOMMinorGC");
+        }
+        visitWeakHandlesForMinorGC(isolate);
+        if (isMainThread()) {
             V8PerIsolateData::from(isolate)->setPreviousSamplingState(TRACE_EVENT_GET_SAMPLING_STATE());
             TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8MinorGC");
         }
         break;
     case v8::kGCTypeMarkSweepCompact:
         TRACE_EVENT_BEGIN2("devtools.timeline,v8", "MajorGC", "usedHeapSizeBefore", usedHeapSize(isolate), "type", "atomic pause");
         gcPrologueForMajorGC(isolate, flags & v8::kGCCallbackFlagConstructRetainedObjectInfos);
         break;
     case v8::kGCTypeIncrementalMarking:
         TRACE_EVENT_BEGIN2("devtools.timeline,v8", "MajorGC", "usedHeapSizeBefore", usedHeapSize(isolate), "type", "incremental marking");
@@ skipping 133 matching lines @@
     Visitor* m_visitor;
 };
 
 void V8GCController::traceDOMWrappers(v8::Isolate* isolate, Visitor* visitor)
 {
     DOMWrapperTracer tracer(visitor);
     v8::V8::VisitHandlesWithClassIds(isolate, &tracer);
 }
 
 } // namespace blink