Untangle RNG from v8 core

src/utils.h

Index: src/utils.h
diff --git a/src/utils.h b/src/utils.h
index a0553d266c5b2b045a6e25f9ed34ba388b16f2b3..7ab58ce3bc75160c677d934acfad7ffd96aa2a95 100644
--- a/src/utils.h
+++ b/src/utils.h
@@ -10,6 +10,7 @@
 #include <string.h>
 
 #include "src/allocation.h"
+#include "src/base/macros.h"
 #include "src/checks.h"
 #include "src/globals.h"
 #include "src/list.h"
@@ -22,8 +23,6 @@ namespace internal {
 // ----------------------------------------------------------------------------
 // General helper functions
 
-#define IS_POWER_OF_TWO(x) ((x) != 0 && (((x) & ((x) - 1)) == 0))
-
 // Returns true iff x is a power of 2. Cannot be used with the maximally
 // negative value of the type T (the -1 overflows).
 template <typename T>