incremental_marking_test: HeapLinkedHashSetSwapTest should be called Swap() function

This unit test is named SwapTest. But, in actual, Move() function is called.

Change-Id: I929047b9a04dd407534c769c5b4edc97f466c0b4
Reviewed-on: https://chromium-review.googlesource.com/1124341
Commit-Queue: Haruka Matsumura <harukamt@google.com>
Reviewed-by: Keishi Hattori <keishi@chromium.org>
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Cr-Commit-Position: refs/heads/master@{#572468}

third_party/blink/renderer/platform/heap/incremental_marking_test.cc

@@ -1059,7 +1059,7 @@ TEST(IncrementalMarkingTest, HeapLinkedHashSetMove) {
 TEST(IncrementalMarkingTest, HeapLinkedHashSetSwap) {
   Swap<HeapLinkedHashSet<Member<Object>>>();
   // Weak references are strongified for the current cycle.
-  Move<HeapLinkedHashSet<WeakMember<Object>>>();
+  Swap<HeapLinkedHashSet<WeakMember<Object>>>();
 }
 
 // =============================================================================