Get rid of HStringLength.

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 a92604ecbf0e37040c0e526f1302bd655e6e2f82..cf1e7c70f5f4faedad2d567b7fd19309a46b41fa 100644
--- a/src/arm/lithium-codegen-arm.cc
+++ b/src/arm/lithium-codegen-arm.cc
@@ -4645,13 +4645,6 @@ void LCodeGen::DoDeferredStringCharFromCode(LStringCharFromCode* instr) {
 }
 
 
-void LCodeGen::DoStringLength(LStringLength* instr) {
-  Register string = ToRegister(instr->string());
-  Register result = ToRegister(instr->result());
-  __ ldr(result, FieldMemOperand(string, String::kLengthOffset));
-}
-
-
 void LCodeGen::DoInteger32ToDouble(LInteger32ToDouble* instr) {
   LOperand* input = instr->value();
   ASSERT(input->IsRegister() || input->IsStackSlot());