[heap] Introduce enum of garbage collection reasons.

test/cctest/heap/test-array-buffer-tracker.cc

Index: test/cctest/heap/test-array-buffer-tracker.cc
diff --git a/test/cctest/heap/test-array-buffer-tracker.cc b/test/cctest/heap/test-array-buffer-tracker.cc
index 80fffc5f345265121df065dff7a761b9803037c6..173d1fa85fa6c1ac54b9d0ea2fa66b2b7c7811da 100644
--- a/test/cctest/heap/test-array-buffer-tracker.cc
+++ b/test/cctest/heap/test-array-buffer-tracker.cc
@@ -130,7 +130,7 @@ TEST(ArrayBuffer_Compaction) {
   page_before_gc->SetFlag(MemoryChunk::FORCE_EVACUATION_CANDIDATE_FOR_TESTING);
   CHECK(IsTracked(*buf1));
 
-  heap->CollectAllGarbage();
+  CcTest::CollectAllGarbage(i::Heap::kFinalizeIncrementalMarkingMask);
 
   Page* page_after_gc = Page::FromAddress(buf1->address());
   CHECK(IsTracked(*buf1));
@@ -177,7 +177,7 @@ TEST(ArrayBuffer_UnregisterDuringSweep) {
       CHECK(IsTracked(*buf2));
     }
 
-    heap->CollectGarbage(OLD_SPACE);
+    CcTest::CollectGarbage(OLD_SPACE);
     // |Externalize| will cause the buffer to be |Unregister|ed. Without
     // barriers and proper synchronization this will trigger a data race on
     // TSAN.