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

src/ia32/assembler-ia32.cc

Index: src/ia32/assembler-ia32.cc
diff --git a/src/ia32/assembler-ia32.cc b/src/ia32/assembler-ia32.cc
index d8cd59cf50433b59fc97a43eef6d26b823ff8c79..5dc733ad9b90f20df178217c5d8e6812a9b507d3 100644
--- a/src/ia32/assembler-ia32.cc
+++ b/src/ia32/assembler-ia32.cc
@@ -38,6 +38,7 @@
 
 #if V8_TARGET_ARCH_IA32
 
+#include "src/base/bits.h"
 #include "src/base/cpu.h"
 #include "src/disassembler.h"
 #include "src/macro-assembler.h"
@@ -271,7 +272,7 @@ void Assembler::GetCode(CodeDesc* desc) {
 
 
 void Assembler::Align(int m) {
-  DCHECK(IsPowerOf2(m));
+  DCHECK(base::bits::IsPowerOfTwo32(m));
   int mask = m - 1;
   int addr = pc_offset();
   Nop((m - (addr & mask)) & mask);