526   { GCTracer tracer(this, gc_reason, collector_reason);  in CollectGarbage()  local
530     tracer.set_gc_count(gc_count_);  in CollectGarbage()
533     tracer.set_collector(collector);  in CollectGarbage()
540         PerformGarbageCollection(collector, &tracer);  in CollectGarbage()
558   GCTracer tracer(this, NULL, NULL);  in PerformScavenge()  local
560     PerformGarbageCollection(SCAVENGER, &tracer);  in PerformScavenge()
562     PerformGarbageCollection(MARK_COMPACTOR, &tracer);  in PerformScavenge()
764                                     GCTracer* tracer) {  in PerformGarbageCollection()  argument
776     GCTracer::Scope scope(tracer, GCTracer::Scope::EXTERNAL);  in PerformGarbageCollection()
802     MarkCompact(tracer);  in PerformGarbageCollection()
831     tracer_ = tracer;  in PerformGarbageCollection()
873     GCTracer::Scope scope(tracer, GCTracer::Scope::EXTERNAL);  in PerformGarbageCollection()
897     GCTracer::Scope scope(tracer, GCTracer::Scope::EXTERNAL);  in PerformGarbageCollection()
908 void Heap::MarkCompact(GCTracer* tracer) {  in MarkCompact()  argument
912   mark_compact_collector_.Prepare(tracer);  in MarkCompact()
915   tracer->set_full_gc_count(ms_count_);  in MarkCompact()
1655         heap->tracer()->increment_promoted_objects_size(object_size);  in EvacuateObject()
6419   explicit MarkVisitor(PathTracer* tracer) : tracer_(tracer) {}  in MarkVisitor()  argument
6435   explicit UnmarkVisitor(PathTracer* tracer) : tracer_(tracer) {}  in UnmarkVisitor()  argument
6591   PathTracer tracer(target, PathTracer::FIND_ALL, VISIT_ALL);  in TracePathToObject()  local
6592   IterateRoots(&tracer, VISIT_ONLY_STRONG);  in TracePathToObject()
6600   PathTracer tracer(PathTracer::kAnyGlobalObject,  in TracePathToGlobal()  local
6603   IterateRoots(&tracer, VISIT_ONLY_STRONG);  in TracePathToGlobal()