Create a common subclass for arrays

src/ia32/lithium-codegen-ia32.cc

Index: src/ia32/lithium-codegen-ia32.cc
diff --git a/src/ia32/lithium-codegen-ia32.cc b/src/ia32/lithium-codegen-ia32.cc
index df7d48952f3f60c9cda0ca069ba35231c55ace55..1fa5a3a4e95932106016e8df47b40f68243b24e4 100644
--- a/src/ia32/lithium-codegen-ia32.cc
+++ b/src/ia32/lithium-codegen-ia32.cc
@@ -1211,17 +1211,11 @@ void LCodeGen::DoJSArrayLength(LJSArrayLength* instr) {
 }
 
 
-void LCodeGen::DoFixedArrayLength(LFixedArrayLength* instr) {
+void LCodeGen::DoFixedArrayBaseLength(
+    LFixedArrayBaseLength* instr) {
   Register result = ToRegister(instr->result());
   Register array = ToRegister(instr->InputAt(0));
-  __ mov(result, FieldOperand(array, FixedArray::kLengthOffset));
-}
-
-
-void LCodeGen::DoExternalArrayLength(LExternalArrayLength* instr) {
-  Register result = ToRegister(instr->result());
-  Register array = ToRegister(instr->InputAt(0));
-  __ mov(result, FieldOperand(array, ExternalArray::kLengthOffset));
+  __ mov(result, FieldOperand(array, FixedArrayBase::kLengthOffset));
 }