Replace HCheckPrototypeMaps by explicit map checks of constant values.

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..d87dcb29f543017f6e128cca9d9fa5381b670e2f 100644
--- a/src/arm/lithium-codegen-arm.cc
+++ b/src/arm/lithium-codegen-arm.cc
@@ -5302,25 +5302,6 @@ void LCodeGen::DoClampTToUint8(LClampTToUint8* instr) {
 }
 
 
-void LCodeGen::DoCheckPrototypeMaps(LCheckPrototypeMaps* instr) {
-  if (instr->hydrogen()->CanOmitPrototypeChecks()) return;
-
-  Register prototype_reg = ToRegister(instr->temp());
-  Register map_reg = ToRegister(instr->temp2());
-
-  ZoneList<Handle<JSObject> >* prototypes = instr->prototypes();
-  ZoneList<Handle<Map> >* maps = instr->maps();
-
-  ASSERT(prototypes->length() == maps->length());
-
-  for (int i = 0; i < prototypes->length(); i++) {
-    __ LoadHeapObject(prototype_reg, prototypes->at(i));
-    __ ldr(map_reg, FieldMemOperand(prototype_reg, HeapObject::kMapOffset));
-    DoCheckMapCommon(map_reg, maps->at(i), instr->environment());
-  }
-}
-
-
 void LCodeGen::DoAllocate(LAllocate* instr) {
   class DeferredAllocate: public LDeferredCode {
    public: