First step to cleanup the power-of-2 mess.

src/compiler/machine-type.h

Index: src/compiler/machine-type.h
diff --git a/src/compiler/machine-type.h b/src/compiler/machine-type.h
index 6e749abb1596a5d067690ed0819292e96dc991e2..22513d984d6d6e00f0be7fa26345493be3af0d9e 100644
--- a/src/compiler/machine-type.h
+++ b/src/compiler/machine-type.h
@@ -5,6 +5,7 @@
 #ifndef V8_COMPILER_MACHINE_TYPE_H_
 #define V8_COMPILER_MACHINE_TYPE_H_
 
+#include "src/base/bits.h"
 #include "src/globals.h"
 
 namespace v8 {
@@ -82,7 +83,7 @@ inline MachineType TypeOf(MachineType machine_type) {
 // Gets only the representation of the given type.
 inline MachineType RepresentationOf(MachineType machine_type) {
   int result = machine_type & kRepMask;
-  CHECK(IsPowerOf2(result));
+  CHECK(base::bits::IsPowerOfTwo32(result));
   return static_cast<MachineType>(result);
 }