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

src/compiler/arm/instruction-selector-arm.cc

Index: src/compiler/arm/instruction-selector-arm.cc
diff --git a/src/compiler/arm/instruction-selector-arm.cc b/src/compiler/arm/instruction-selector-arm.cc
index 73e1aea9445ee89726fce2a821077de68e6915ae..bdfb7838b99244d70a7754dfbeca21ce5cae72f1 100644
--- a/src/compiler/arm/instruction-selector-arm.cc
+++ b/src/compiler/arm/instruction-selector-arm.cc
@@ -596,14 +596,14 @@ void InstructionSelector::VisitInt32Mul(Node* node) {
   Int32BinopMatcher m(node);
   if (m.right().HasValue() && m.right().Value() > 0) {
     int32_t value = m.right().Value();
-    if (IsPowerOf2(value - 1)) {
+    if (base::bits::IsPowerOfTwo32(value - 1)) {
       Emit(kArmAdd | AddressingModeField::encode(kMode_Operand2_R_LSL_I),
            g.DefineAsRegister(node), g.UseRegister(m.left().node()),
            g.UseRegister(m.left().node()),
            g.TempImmediate(WhichPowerOf2(value - 1)));
       return;
     }
-    if (value < kMaxInt && IsPowerOf2(value + 1)) {
+    if (value < kMaxInt && base::bits::IsPowerOfTwo32(value + 1)) {
       Emit(kArmRsb | AddressingModeField::encode(kMode_Operand2_R_LSL_I),
            g.DefineAsRegister(node), g.UseRegister(m.left().node()),
            g.UseRegister(m.left().node()),