[heap] New heuristics for starting of incremental marking.

src/heap/incremental-marking.cc

Index: src/heap/incremental-marking.cc
diff --git a/src/heap/incremental-marking.cc b/src/heap/incremental-marking.cc
index beaef22ef1b911673d212118d08f1deb9e473f38..e57f216697af95ae881de9c8dd0630fcb3f1d6ad 100644
--- a/src/heap/incremental-marking.cc
+++ b/src/heap/incremental-marking.cc
@@ -401,22 +401,6 @@ void IncrementalMarking::ActivateIncrementalWriteBarrier() {
 }
 
 
-bool IncrementalMarking::ShouldActivateEvenWithoutIdleNotification() {
-#ifndef DEBUG
-  static const intptr_t kActivationThreshold = 8 * MB;
-#else
-  // TODO(gc) consider setting this to some low level so that some
-  // debug tests run with incremental marking and some without.
-  static const intptr_t kActivationThreshold = 0;
-#endif
-  // Don't switch on for very small heaps.
-  return CanBeActivated() &&
-         heap_->PromotedSpaceSizeOfObjects() > kActivationThreshold &&
-         heap_->HeapIsFullEnoughToStartIncrementalMarking(
-             heap_->old_generation_allocation_limit());
-}
-
-
 bool IncrementalMarking::WasActivated() { return was_activated_; }