Revert of [heap] Uncommit pooled pages concurrently

src/heap/mark-compact.cc

Index: src/heap/mark-compact.cc
diff --git a/src/heap/mark-compact.cc b/src/heap/mark-compact.cc
index 502ef758a7799f36a805267d4fbaed8dd9930b69..4fa3341b9587c35b7a2c1b5df33e9505e986c1de 100644
--- a/src/heap/mark-compact.cc
+++ b/src/heap/mark-compact.cc
@@ -848,7 +848,7 @@
 
   // If concurrent unmapping tasks are still running, we should wait for
   // them here.
-  heap()->memory_allocator()->unmapper()->WaitUntilCompleted();
+  heap()->WaitUntilUnmappingOfFreeChunksCompleted();
 
   // Clear marking bits if incremental marking is aborted.
   if (was_marked_incrementally_ && heap_->ShouldAbortIncrementalMarking()) {
@@ -3541,7 +3541,7 @@
   // slots only handles old space (for unboxed doubles), and thus map space can
   // still contain stale pointers. We only free the chunks after pointer updates
   // to still have access to page headers.
-  heap()->memory_allocator()->unmapper()->FreeQueuedChunks();
+  heap()->FreeQueuedChunks();
 
   {
     TRACE_GC(heap()->tracer(), GCTracer::Scope::MC_EVACUATE_CLEAN_UP);
@@ -3729,7 +3729,7 @@
   }
   evacuation_candidates_.Rewind(0);
   compacting_ = false;
-  heap()->memory_allocator()->unmapper()->FreeQueuedChunks();
+  heap()->FreeQueuedChunks();
 }
 
 int MarkCompactCollector::Sweeper::ParallelSweepSpace(AllocationSpace identity,