Ignore soft heap limit when reserving space.

src/spaces.cc

Index: src/spaces.cc
diff --git a/src/spaces.cc b/src/spaces.cc
index 1fbad551aff63992553b1161e99aaf8fc854a602..d7061a1a7929c7cbd75b000700f980453f447713 100644
--- a/src/spaces.cc
+++ b/src/spaces.cc
@@ -2217,7 +2217,9 @@ bool PagedSpace::ReserveSpace(int size_in_bytes) {
 // You have to call this last, since the implementation from PagedSpace
 // doesn't know that memory was 'promised' to large object space.
 bool LargeObjectSpace::ReserveSpace(int bytes) {
-  return heap()->OldGenerationSpaceAvailable() >= bytes;
+  return heap()->OldGenerationCapacityAvailable() >= bytes &&
+         (!heap()->incremental_marking()->IsStopped() ||
+           heap()->OldGenerationSpaceAvailable() >= bytes);
 }