Never uncommit the whole marking deque in case we can't get it back

src/heap/incremental-marking.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 #include "src/heap/incremental-marking.h"
 
 #include "src/code-stubs.h"
 #include "src/compilation-cache.h"
@@ skipping 500 matching lines @@
                        MarkCompactCollector::INCREMENTAL_COMPACTION);
 
   state_ = MARKING;
 
   RecordWriteStub::Mode mode = is_compacting_
                                    ? RecordWriteStub::INCREMENTAL_COMPACTION
                                    : RecordWriteStub::INCREMENTAL;
 
   PatchIncrementalMarkingRecordWriteStubs(heap_, mode);
 
-  heap_->mark_compact_collector()->EnsureMarkingDequeIsCommittedAndInitialize();
+  heap_->mark_compact_collector()->EnsureMarkingDequeIsCommittedAndInitialize(
+      MarkCompactCollector::kMaxMarkingDequeSize);
 
   ActivateIncrementalWriteBarrier();
 
 // Marking bits are cleared by the sweeper.
 #ifdef VERIFY_HEAP
   if (FLAG_verify_heap) {
     heap_->mark_compact_collector()->VerifyMarkbitsAreClean();
   }
 #endif
 
@@ skipping 490 matching lines @@
 void IncrementalMarking::IncrementIdleMarkingDelayCounter() {
   idle_marking_delay_counter_++;
 }
 
 
 void IncrementalMarking::ClearIdleMarkingDelayCounter() {
   idle_marking_delay_counter_ = 0;
 }
 }  // namespace internal
 }  // namespace v8