Move atomic-utils.h into base/

src/heap/heap.h

Index: src/heap/heap.h
diff --git a/src/heap/heap.h b/src/heap/heap.h
index 6fcb080750baf80d03cf8f4def762accecd3deb8..fd788cdbe991c413d00e7ee2ce74ca9b4a7a2371 100644
--- a/src/heap/heap.h
+++ b/src/heap/heap.h
@@ -13,7 +13,7 @@
 #include "include/v8.h"
 #include "src/allocation.h"
 #include "src/assert-scope.h"
-#include "src/atomic-utils.h"
+#include "src/base/atomic-utils.h"
 #include "src/globals.h"
 #include "src/heap-symbols.h"
 // TODO(mstarzinger): Two more includes to kill!
@@ -2003,11 +2003,11 @@ class Heap {
 
   // This is not the depth of nested AlwaysAllocateScope's but rather a single
   // count, as scopes can be acquired from multiple tasks (read: threads).
-  AtomicNumber<size_t> always_allocate_scope_count_;
+  base::AtomicNumber<size_t> always_allocate_scope_count_;
 
   // Stores the memory pressure level that set by MemoryPressureNotification
   // and reset by a mark-compact garbage collection.
-  AtomicValue<MemoryPressureLevel> memory_pressure_level_;
+  base::AtomicValue<MemoryPressureLevel> memory_pressure_level_;
 
   // For keeping track of context disposals.
   int contexts_disposed_;