Revert "[heap] Optimize NewSpace::AllocatedSinceLastGC"

src/heap/spaces-inl.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_INL_H_
 #define V8_HEAP_SPACES_INL_H_
 
 #include "src/heap/incremental-marking.h"
 #include "src/heap/spaces.h"
 #include "src/isolate.h"
@@ skipping 224 matching lines @@
   return to_space_.ContainsSlow(a);
 }
 
 bool NewSpace::FromSpaceContainsSlow(Address a) {
   return from_space_.ContainsSlow(a);
 }
 
 bool NewSpace::ToSpaceContains(Object* o) { return to_space_.Contains(o); }
 bool NewSpace::FromSpaceContains(Object* o) { return from_space_.Contains(o); }
 
-size_t NewSpace::AllocatedSinceLastGC() {
-  const intptr_t age_mark_offset = Page::OffsetInPage(to_space_.age_mark());
-  const intptr_t top_offset = Page::OffsetInPage(allocation_info_.top());
-  const intptr_t age_mark_delta =
-      age_mark_offset >= Page::kObjectStartOffset
-          ? age_mark_offset - Page::kObjectStartOffset
-          : Page::kAllocatableMemory;
-  const intptr_t top_delta = top_offset >= Page::kObjectStartOffset
-                                 ? top_offset - Page::kObjectStartOffset
-                                 : Page::kAllocatableMemory;
-  DCHECK((allocated_since_last_gc_ > 0) ||
-         (Page::FromAllocationAreaAddress(allocation_info_.top()) ==
-          Page::FromAllocationAreaAddress(to_space_.age_mark())));
-  return static_cast<size_t>(allocated_since_last_gc_ + top_delta -
-                             age_mark_delta);
-}
-
 // --------------------------------------------------------------------------
 // AllocationResult
 
 AllocationSpace AllocationResult::RetrySpace() {
   DCHECK(IsRetry());
   return static_cast<AllocationSpace>(Smi::cast(object_)->value());
 }
 
 Page* Page::Initialize(Heap* heap, MemoryChunk* chunk, Executability executable,
                        SemiSpace* owner) {
@@ skipping 459 matching lines @@
     other->allocation_info_.Reset(nullptr, nullptr);
     return true;
   }
   return false;
 }
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_HEAP_SPACES_INL_H_