[heap] Reland decrease large object limit for regular heap objects.

test/cctest/test-spaces.cc

Index: test/cctest/test-spaces.cc
diff --git a/test/cctest/test-spaces.cc b/test/cctest/test-spaces.cc
index 16d1e8a762c0981254784b350273d6ac347a85c3..e6680a62f222b2c449c16b60f9021f93aff7df46 100644
--- a/test/cctest/test-spaces.cc
+++ b/test/cctest/test-spaces.cc
@@ -430,7 +430,8 @@ TEST(CompactionSpace) {
   // and would thus neither grow, nor be able to allocate an object.
   const int kNumObjects = 100;
   const int kExpectedPages = (kNumObjects / (compaction_space->AreaSize() /
-                                             Page::kMaxRegularHeapObjectSize));
+                                             Page::kMaxRegularHeapObjectSize)) +
+                             1;
   for (int i = 0; i < kNumObjects; i++) {
     compaction_space->AllocateRawUnaligned(Page::kMaxRegularHeapObjectSize)
         .ToObjectChecked();