Revert of [heap] New heuristics for starting of incremental marking.

src/heap/heap-inl.h

 // 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.
 
 #ifndef V8_HEAP_HEAP_INL_H_
 #define V8_HEAP_HEAP_INL_H_
 
 #include <cmath>
 
 #include "src/base/platform/platform.h"
@@ skipping 151 matching lines @@
 }
 
 Address* Heap::OldSpaceAllocationTopAddress() {
   return old_space_->allocation_top_address();
 }
 
 Address* Heap::OldSpaceAllocationLimitAddress() {
   return old_space_->allocation_limit_address();
 }
 
+bool Heap::HeapIsFullEnoughToStartIncrementalMarking(intptr_t limit) {
+  if (FLAG_stress_compaction && (gc_count_ & 1) != 0) return true;
+
+  intptr_t adjusted_allocation_limit = limit - new_space_->Capacity();
+
+  if (PromotedTotalSize() >= adjusted_allocation_limit) return true;
+
+  if (HighMemoryPressure()) return true;
+
+  return false;
+}
+
 void Heap::UpdateNewSpaceAllocationCounter() {
   new_space_allocation_counter_ = NewSpaceAllocationCounter();
 }
 
 size_t Heap::NewSpaceAllocationCounter() {
   return new_space_allocation_counter_ + new_space()->AllocatedSinceLastGC();
 }
 
 template <>
 bool inline Heap::IsOneByte(Vector<const char> str, int chars) {
@@ skipping 291 matching lines @@
 bool Heap::InOldSpace(Object* object) { return old_space_->Contains(object); }
 
 bool Heap::InNewSpaceSlow(Address address) {
   return new_space_->ContainsSlow(address);
 }
 
 bool Heap::InOldSpaceSlow(Address address) {
   return old_space_->ContainsSlow(address);
 }
 
+bool Heap::OldGenerationAllocationLimitReached() {
+  if (!incremental_marking()->IsStopped() && !ShouldOptimizeForMemoryUsage()) {
+    return false;
+  }
+  return OldGenerationSpaceAvailable() < 0;
+}
+
 template <PromotionMode promotion_mode>
 bool Heap::ShouldBePromoted(Address old_address, int object_size) {
   if (promotion_mode == PROMOTE_MARKED) {
     MarkBit mark_bit = ObjectMarking::MarkBitFrom(old_address);
     if (!Marking::IsWhite(mark_bit)) {
       return true;
     }
   }
 
   return Page::FromAddress(old_address)->InIntermediateGeneration();
@@ skipping 337 matching lines @@
 
 void VerifySmisVisitor::VisitPointers(Object** start, Object** end) {
   for (Object** current = start; current < end; current++) {
     CHECK((*current)->IsSmi());
   }
 }
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_HEAP_HEAP_INL_H_