[heap] Reland: Take page lock when scavenging old to new references in Scavenger.

src/heap/array-buffer-tracker.cc

Index: src/heap/array-buffer-tracker.cc
diff --git a/src/heap/array-buffer-tracker.cc b/src/heap/array-buffer-tracker.cc
index c4ad3ba2c771057211a152f376524cc7e2bbdc09..5423dfaed9c731de3835aede1c577c7a650b0811 100644
--- a/src/heap/array-buffer-tracker.cc
+++ b/src/heap/array-buffer-tracker.cc
@@ -130,7 +130,7 @@ bool ArrayBufferTracker::ProcessBuffers(Page* page, ProcessingMode mode) {
 bool ArrayBufferTracker::IsTracked(JSArrayBuffer* buffer) {
   Page* page = Page::FromAddress(buffer->address());
   {
-    base::LockGuard<base::Mutex> guard(page->mutex());
+    base::LockGuard<base::RecursiveMutex> guard(page->mutex());
     LocalArrayBufferTracker* tracker = page->local_tracker();
     if (tracker == nullptr) return false;
     return tracker->IsTracked(buffer);