[heap] Cleanup: Remove WAS_SWEPT flag.

src/heap/spaces.cc

Index: src/heap/spaces.cc
diff --git a/src/heap/spaces.cc b/src/heap/spaces.cc
index cdf1a193b60295099d38b111f09ebba3f550a9f8..405b55051f0e336e4f2862ae68bcccb3d434a47c 100644
--- a/src/heap/spaces.cc
+++ b/src/heap/spaces.cc
@@ -35,7 +35,7 @@ HeapObjectIterator::HeapObjectIterator(Page* page) {
          owner == page->heap()->code_space());
   Initialize(reinterpret_cast<PagedSpace*>(owner), page->area_start(),
              page->area_end(), kOnePageOnly);
-  DCHECK(page->WasSwept() || page->SweepingCompleted());
+  DCHECK(page->SweepingCompleted());
 }
 
 
@@ -66,7 +66,7 @@ bool HeapObjectIterator::AdvanceToNextPage() {
       cur_page);
   cur_addr_ = cur_page->area_start();
   cur_end_ = cur_page->area_end();
-  DCHECK(cur_page->WasSwept() || cur_page->SweepingCompleted());
+  DCHECK(cur_page->SweepingCompleted());
   return true;
 }
 
@@ -469,7 +469,7 @@ MemoryChunk* MemoryChunk::Initialize(Heap* heap, Address base, size_t size,
   chunk->write_barrier_counter_ = kWriteBarrierCounterGranularity;
   chunk->progress_bar_ = 0;
   chunk->high_water_mark_.SetValue(static_cast<intptr_t>(area_start - base));
-  chunk->parallel_sweeping_state().SetValue(kSweepingDone);
+  chunk->concurrent_sweeping_state().SetValue(kSweepingDone);
   chunk->parallel_compaction_state().SetValue(kCompactingDone);
   chunk->mutex_ = NULL;
   chunk->available_in_small_free_list_ = 0;
@@ -480,7 +480,6 @@ MemoryChunk* MemoryChunk::Initialize(Heap* heap, Address base, size_t size,
   chunk->ResetLiveBytes();
   Bitmap::Clear(chunk);
   chunk->initialize_scan_on_scavenge(false);
-  chunk->SetFlag(WAS_SWEPT);
   chunk->set_next_chunk(nullptr);
   chunk->set_prev_chunk(nullptr);
 
@@ -923,7 +922,7 @@ bool MemoryAllocator::CommitExecutableMemory(base::VirtualMemory* vm,
 
 void MemoryChunk::IncrementLiveBytesFromMutator(HeapObject* object, int by) {
   MemoryChunk* chunk = MemoryChunk::FromAddress(object->address());
-  if (!chunk->InNewSpace() && !static_cast<Page*>(chunk)->WasSwept()) {
+  if (!chunk->InNewSpace() && !static_cast<Page*>(chunk)->SweepingCompleted()) {
     static_cast<PagedSpace*>(chunk->owner())->Allocate(by);
   }
   chunk->IncrementLiveBytes(by);
@@ -1225,11 +1224,11 @@ void PagedSpace::IncreaseCapacity(int size) {
 }
 
 
-void PagedSpace::ReleasePage(Page* page) {
+void PagedSpace::ReleasePage(Page* page, bool evict_free_list_items) {
   DCHECK(page->LiveBytes() == 0);
   DCHECK(AreaSize() == page->area_size());
 
-  if (page->WasSwept()) {
+  if (evict_free_list_items) {
     intptr_t size = free_list_.EvictFreeListItems(page);
     accounting_stats_.AllocateBytes(size);
     DCHECK_EQ(AreaSize(), static_cast<int>(size));
@@ -1275,7 +1274,7 @@ void PagedSpace::Verify(ObjectVisitor* visitor) {
     if (page == Page::FromAllocationTop(allocation_info_.top())) {
       allocation_pointer_found_in_space = true;
     }
-    CHECK(page->WasSwept());
+    CHECK(page->SweepingCompleted());
     HeapObjectIterator it(page);
     Address end_of_previous_object = page->area_start();
     Address top = page->area_end();