Add V8_ALIGNAS() and V8_ALIGNOF() and use that in lazy-instance.h.

src/circular-queue.h

 // Copyright 2010 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 52 matching lines @@
   void FinishDequeue();
 
  private:
   // Reserved values for the entry marker.
   enum {
     kEmpty,  // Marks clean (processed) entries.
     kFull    // Marks entries already filled by the producer but not yet
              // completely processed by the consumer.
   };
 
-  struct V8_ALIGNAS(PROCESSOR_CACHE_LINE_SIZE) Entry {
+  struct V8_ALIGNED(PROCESSOR_CACHE_LINE_SIZE) Entry {
     Entry() : marker(kEmpty) {}
     T record;
     Atomic32 marker;
   };
 
   Entry* Next(Entry* entry);
 
   Entry buffer_[Length];
-  V8_ALIGNAS(PROCESSOR_CACHE_LINE_SIZE) Entry* enqueue_pos_;
-  V8_ALIGNAS(PROCESSOR_CACHE_LINE_SIZE) Entry* dequeue_pos_;
+  V8_ALIGNED(PROCESSOR_CACHE_LINE_SIZE) Entry* enqueue_pos_;
+  V8_ALIGNED(PROCESSOR_CACHE_LINE_SIZE) Entry* dequeue_pos_;
 
   DISALLOW_COPY_AND_ASSIGN(SamplingCircularQueue);
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_CIRCULAR_QUEUE_H_