Remove HFixedArrayBaseLength instruction and replace with regular HLoadNamedField.

src/arm/lithium-codegen-arm.cc

Index: src/arm/lithium-codegen-arm.cc
diff --git a/src/arm/lithium-codegen-arm.cc b/src/arm/lithium-codegen-arm.cc
index 852509557ecafbac18daf5b0c044ae864c7697aa..272db157a86b5b4e8e787cd756b763cc8602b855 100644
--- a/src/arm/lithium-codegen-arm.cc
+++ b/src/arm/lithium-codegen-arm.cc
@@ -1846,13 +1846,6 @@ void LCodeGen::DoConstantT(LConstantT* instr) {
 }
 
 
-void LCodeGen::DoFixedArrayBaseLength(LFixedArrayBaseLength* instr) {
-  Register result = ToRegister(instr->result());
-  Register array = ToRegister(instr->value());
-  __ ldr(result, FieldMemOperand(array, FixedArrayBase::kLengthOffset));
-}
-
-
 void LCodeGen::DoMapEnumLength(LMapEnumLength* instr) {
   Register result = ToRegister(instr->result());
   Register map = ToRegister(instr->value());