Change halfway-to-the-max GC trigger to measure committed pages, not allocated objects

src/heap/mark-compact-inl.h

Index: src/heap/mark-compact-inl.h
diff --git a/src/heap/mark-compact-inl.h b/src/heap/mark-compact-inl.h
index 66b0a59cec6c0b32ba3cf2147e0af2e55bd81f98..8a357c87265a76a5686dce74d21b3cd55df07dcf 100644
--- a/src/heap/mark-compact-inl.h
+++ b/src/heap/mark-compact-inl.h
@@ -22,7 +22,7 @@ MarkBit Marking::MarkBitFrom(Address addr) {
 
 void MarkCompactCollector::SetFlags(int flags) {
   reduce_memory_footprint_ = ((flags & Heap::kReduceMemoryFootprintMask) != 0);
-  abort_incremental_marking_ =
+  incremental_marking_abort_requested_ =
       ((flags & Heap::kAbortIncrementalMarkingMask) != 0);
 }