[heap] Remove unnecessary marking specializations

src/heap/incremental-marking.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/heap/incremental-marking.h"
 
 #include "src/code-stubs.h"
 #include "src/compilation-cache.h"
 #include "src/conversions.h"
 #include "src/heap/gc-idle-time-handler.h"
@@ skipping 161 matching lines @@
 #endif
 }
 
 class IncrementalMarkingMarkingVisitor
     : public StaticMarkingVisitor<IncrementalMarkingMarkingVisitor> {
  public:
   static void Initialize() {
     StaticMarkingVisitor<IncrementalMarkingMarkingVisitor>::Initialize();
     table_.Register(kVisitFixedArray, &VisitFixedArrayIncremental);
     table_.Register(kVisitNativeContext, &VisitNativeContextIncremental);
-    table_.Register(kVisitJSRegExp, &VisitJSRegExp);
   }
 
   static const int kProgressBarScanningChunk = 32 * 1024;
 
   static void VisitFixedArrayIncremental(Map* map, HeapObject* object) {
     MemoryChunk* chunk = MemoryChunk::FromAddress(object->address());
     // TODO(mstarzinger): Move setting of the flag to the allocation site of
     // the array. The visitor should just check the flag.
     if (FLAG_use_marking_progress_bar &&
         chunk->owner()->identity() == LO_SPACE) {
@@ skipping 1008 matching lines @@
   idle_marking_delay_counter_++;
 }
 
 
 void IncrementalMarking::ClearIdleMarkingDelayCounter() {
   idle_marking_delay_counter_ = 0;
 }
 
 }  // namespace internal
 }  // namespace v8