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

src/utils.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_UTILS_H_
 #define V8_UTILS_H_
 
 #include <limits.h>
 #include <stdlib.h>
 #include <string.h>
 #include <cmath>
 
 #include "include/v8.h"
 #include "src/allocation.h"
+#include "src/base/bits.h"
 #include "src/base/logging.h"
 #include "src/base/macros.h"
 #include "src/base/platform/platform.h"
 #include "src/globals.h"
 #include "src/list.h"
 #include "src/vector.h"
 
 namespace v8 {
 namespace internal {
 
 // ----------------------------------------------------------------------------
 // General helper functions
 
 // X must be a power of 2.  Returns the number of trailing zeros.
 inline int WhichPowerOf2(uint32_t x) {
-  DCHECK(IsPowerOf2(x));
+  DCHECK(base::bits::IsPowerOfTwo32(x));
   int bits = 0;
 #ifdef DEBUG
   int original_x = x;
 #endif
   if (x >= 0x10000) {
     bits += 16;
     x >>= 16;
   }
   if (x >= 0x100) {
     bits += 8;
@@ skipping 1490 matching lines @@
   }
 
   *index = result;
   return true;
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_UTILS_H_