[heap] Remove left-overs of RESCAN_ON_EVACUATION flag.

src/heap/spaces.h

 // Copyright 2011 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.
 
 #ifndef V8_HEAP_SPACES_H_
 #define V8_HEAP_SPACES_H_
 
 #include "src/allocation.h"
 #include "src/atomic-utils.h"
 #include "src/base/atomicops.h"
@@ skipping 282 matching lines @@
 class MemoryChunk {
  public:
   enum MemoryChunkFlags {
     IS_EXECUTABLE,
     POINTERS_TO_HERE_ARE_INTERESTING,
     POINTERS_FROM_HERE_ARE_INTERESTING,
     IN_FROM_SPACE,  // Mutually exclusive with IN_TO_SPACE.
     IN_TO_SPACE,    // All pages in new space has one of these two set.
     NEW_SPACE_BELOW_AGE_MARK,
     EVACUATION_CANDIDATE,
-    RESCAN_ON_EVACUATION,
     NEVER_EVACUATE,  // May contain immortal immutables.
 
     // Large objects can have a progress bar in their page header. These object
     // are scanned in increments and will be kept black while being scanned.
     // Even if the mutator writes to them they will be kept black and a white
     // to grey transition is performed in the value.
     HAS_PROGRESS_BAR,
 
     // This flag is intended to be used for testing. Works only when both
     // FLAG_stress_compaction and FLAG_manual_evacuation_candidates_selection
@@ skipping 34 matching lines @@
 
   static const int kPointersToHereAreInterestingMask =
       1 << POINTERS_TO_HERE_ARE_INTERESTING;
 
   static const int kPointersFromHereAreInterestingMask =
       1 << POINTERS_FROM_HERE_ARE_INTERESTING;
 
   static const int kEvacuationCandidateMask = 1 << EVACUATION_CANDIDATE;
 
   static const int kSkipEvacuationSlotsRecordingMask =
-      (1 << EVACUATION_CANDIDATE) | (1 << RESCAN_ON_EVACUATION) |
-      (1 << IN_FROM_SPACE) | (1 << IN_TO_SPACE);
+      (1 << EVACUATION_CANDIDATE) | (1 << IN_FROM_SPACE) | (1 << IN_TO_SPACE);
 
   static const intptr_t kAlignment =
       (static_cast<uintptr_t>(1) << kPageSizeBits);
 
   static const intptr_t kAlignmentMask = kAlignment - 1;
 
   static const intptr_t kSizeOffset = 0;
 
   static const intptr_t kLiveBytesOffset =
       kSizeOffset + kPointerSize  // size_t size
@@ skipping 2649 matching lines @@
     count = 0;
   }
   // Must be small, since an iteration is used for lookup.
   static const int kMaxComments = 64;
 };
 #endif
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_HEAP_SPACES_H_