Fix compilation on Windows after r16284

BUG=None
R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/23361023

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16285 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/circular-queue.h

@@ -79,8 +79,8 @@ class SamplingCircularQueue {
   Entry* Next(Entry* entry);
 
   Entry buffer_[Length];
-  Entry* enqueue_pos_ V8_ALIGNAS(PROCESSOR_CACHE_LINE_SIZE);
-  Entry* dequeue_pos_ V8_ALIGNAS(PROCESSOR_CACHE_LINE_SIZE);
+  V8_ALIGNAS(PROCESSOR_CACHE_LINE_SIZE) Entry* enqueue_pos_;
+  V8_ALIGNAS(PROCESSOR_CACHE_LINE_SIZE) Entry* dequeue_pos_;
 
   DISALLOW_COPY_AND_ASSIGN(SamplingCircularQueue);
 };