Improved support for objects inside persistent memory.

base/metrics/persistent_memory_allocator.cc

Index: base/metrics/persistent_memory_allocator.cc
diff --git a/base/metrics/persistent_memory_allocator.cc b/base/metrics/persistent_memory_allocator.cc
index 4e6b7ef4d2191d6c939a3aa99b0e657ee202b292..4713c336c608f4484c39ff8538c12121b207fc82 100644
--- a/base/metrics/persistent_memory_allocator.cc
+++ b/base/metrics/persistent_memory_allocator.cc
@@ -734,10 +734,10 @@ PersistentMemoryAllocator::GetBlock(Reference ref, uint32_t type_id,
                                     uint32_t size, bool queue_ok,
                                     bool free_ok) const {
   // Validation of parameters.
-  if (ref % kAllocAlignment != 0)
-    return nullptr;
   if (ref < (queue_ok ? kReferenceQueue : sizeof(SharedMetadata)))
     return nullptr;
+  if (ref % kAllocAlignment != 0)
+    return nullptr;
   size += sizeof(BlockHeader);
   if (ref + size > mem_size_)
     return nullptr;