Remove base's ALIGNOF/ALIGNAS in favor of alignof/alignas.

base/metrics/persistent_memory_allocator.h

Index: base/metrics/persistent_memory_allocator.h
diff --git a/base/metrics/persistent_memory_allocator.h b/base/metrics/persistent_memory_allocator.h
index 9fdef0192a66195bbadcac295f4ede384f9edfcb..45a24649483f9be72ad86f08712bbf6badf97bd2 100644
--- a/base/metrics/persistent_memory_allocator.h
+++ b/base/metrics/persistent_memory_allocator.h
@@ -427,7 +427,7 @@ class BASE_EXPORT PersistentMemoryAllocator {
       return nullptr;
     // Ensure the allocator's internal alignment is sufficient for this object.
     // This protects against coding errors in the allocator.
-    DCHECK_EQ(0U, reinterpret_cast<uintptr_t>(mem) & (ALIGNOF(T) - 1));
+    DCHECK_EQ(0U, reinterpret_cast<uintptr_t>(mem) & (alignof(T) - 1));
     // First change the type to "transitioning" so that there is no race
     // condition with the clearing and construction of the object should
     // another thread be simultaneously iterating over data. This will
@@ -469,7 +469,7 @@ class BASE_EXPORT PersistentMemoryAllocator {
         const_cast<void*>(GetBlockData(ref, T::kPersistentTypeId, size));
     if (!mem)
       return nullptr;
-    DCHECK_EQ(0U, reinterpret_cast<uintptr_t>(mem) & (ALIGNOF(T) - 1));
+    DCHECK_EQ(0U, reinterpret_cast<uintptr_t>(mem) & (alignof(T) - 1));
     return new (mem) T();
   }
   template <typename T>