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

content/renderer/devtools/lock_free_circular_queue.h

Index: content/renderer/devtools/lock_free_circular_queue.h
diff --git a/content/renderer/devtools/lock_free_circular_queue.h b/content/renderer/devtools/lock_free_circular_queue.h
index f8a48119d0a2a32c35978cd45535283baa40dd0c..0bb2997218deb19b90c51be0b7dd6953ec36e4cb 100644
--- a/content/renderer/devtools/lock_free_circular_queue.h
+++ b/content/renderer/devtools/lock_free_circular_queue.h
@@ -11,7 +11,7 @@
 #include "base/macros.h"
 #include "base/memory/aligned_memory.h"
 
-#define CACHELINE_ALIGNED ALIGNAS(64)
+#define CACHELINE_ALIGNED alignas(64)
 
 namespace content {
 
@@ -125,7 +125,7 @@ typename LockFreeCircularQueue<T, L>::Entry* LockFreeCircularQueue<T, L>::Next(
 template <typename T, unsigned L>
 void* LockFreeCircularQueue<T, L>::operator new(size_t size) {
   typedef LockFreeCircularQueue<T, L> QueueTypeAlias;
-  return base::AlignedAlloc(size, ALIGNOF(QueueTypeAlias));
+  return base::AlignedAlloc(size, alignof(QueueTypeAlias));
 }
 
 template <typename T, unsigned L>