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

src/heap/array-buffer-tracker.cc

 // Copyright 2015 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/heap/array-buffer-tracker.h"
 #include "src/heap/array-buffer-tracker-inl.h"
 #include "src/heap/heap.h"
 
 namespace v8 {
 namespace internal {
@@ skipping 112 matching lines @@
         return mode == kUpdateForwardedKeepOthers
                    ? LocalArrayBufferTracker::kKeepEntry
                    : LocalArrayBufferTracker::kRemoveEntry;
       });
   return tracker->IsEmpty();
 }
 
 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);
   }
 }
 
 }  // namespace internal
 }  // namespace v8