Revert of Fix logic for doing incremental marking steps on tenured allocation.

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/base/atomicops.h"
 #include "src/base/bits.h"
@@ skipping 1565 matching lines @@
 
  private:
   // The size range of blocks, in bytes.
   static const int kMinBlockSize = 3 * kPointerSize;
   static const int kMaxBlockSize = Page::kMaxRegularHeapObjectSize;
 
   FreeSpace* FindNodeFor(int size_in_bytes, int* node_size);
 
   PagedSpace* owner_;
   Heap* heap_;
-  int unreported_allocation_;
 
   static const int kSmallListMax = 0xff * kPointerSize;
   static const int kMediumListMax = 0x7ff * kPointerSize;
   static const int kLargeListMax = 0x3fff * kPointerSize;
   static const int kSmallAllocationMax = kSmallListMin - kPointerSize;
   static const int kMediumAllocationMax = kSmallListMax;
   static const int kLargeAllocationMax = kMediumListMax;
   FreeListCategory small_list_;
   FreeListCategory medium_list_;
   FreeListCategory large_list_;
@@ skipping 177 matching lines @@
   int Free(Address start, int size_in_bytes) {
     int wasted = free_list_.Free(start, size_in_bytes);
     accounting_stats_.DeallocateBytes(size_in_bytes);
     accounting_stats_.WasteBytes(wasted);
     return size_in_bytes - wasted;
   }
 
   void ResetFreeList() { free_list_.Reset(); }
 
   // Set space allocation info.
-  void SetTopAndLimit(Address top, Address limit);
+  void SetTopAndLimit(Address top, Address limit) {
+    DCHECK(top == limit ||
+           Page::FromAddress(top) == Page::FromAddress(limit - 1));
+    MemoryChunk::UpdateHighWaterMark(allocation_info_.top());
+    allocation_info_.set_top(top);
+    allocation_info_.set_limit(limit);
+  }
 
   // Empty space allocation info, returning unused area to free list.
   void EmptyAllocationInfo() {
     // Mark the old linear allocation area with a free space map so it can be
     // skipped when scanning the heap.
     int old_linear_size = static_cast<int>(limit() - top());
     Free(top(), old_linear_size);
     SetTopAndLimit(NULL, NULL);
   }
 
@@ skipping 1060 matching lines @@
     count = 0;
   }
   // Must be small, since an iteration is used for lookup.
   static const int kMaxComments = 64;
 };
 #endif
 }
 }  // namespace v8::internal
 
 #endif  // V8_HEAP_SPACES_H_