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

src/objects.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_OBJECTS_H_
 #define V8_OBJECTS_H_
 
 #include "src/allocation.h"
 #include "src/assert-scope.h"
+#include "src/base/bits.h"
 #include "src/builtins.h"
 #include "src/checks.h"
 #include "src/elements-kind.h"
 #include "src/field-index.h"
 #include "src/flags.h"
 #include "src/list.h"
 #include "src/property-details.h"
 #include "src/smart-pointers.h"
 #include "src/unicode-inl.h"
 #include "src/zone.h"
@@ skipping 3667 matching lines @@
     // use bit-wise AND with a mask, so the capacity must be positive
     // and non-zero.
     DCHECK(capacity > 0);
     DCHECK(capacity <= kMaxCapacity);
     set(kCapacityIndex, Smi::FromInt(capacity));
   }
 
 
   // Returns probe entry.
   static uint32_t GetProbe(uint32_t hash, uint32_t number, uint32_t size) {
-    DCHECK(IsPowerOf2(size));
+    DCHECK(base::bits::IsPowerOfTwo32(size));
     return (hash + GetProbeOffset(number)) & (size - 1);
   }
 
   inline static uint32_t FirstProbe(uint32_t hash, uint32_t size) {
     return hash & (size - 1);
   }
 
   inline static uint32_t NextProbe(
       uint32_t last, uint32_t number, uint32_t size) {
     return (last + number) & (size - 1);
@@ skipping 7445 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_