Reapply "Remove classes Computation and BindInstr."

runtime/vm/locations.cc

Index: runtime/vm/locations.cc
diff --git a/runtime/vm/locations.cc b/runtime/vm/locations.cc
index 04990d65e39c67d0bef54cb959793d75cab874d4..3f7ded17a157430d6763b2c4282761e8e5b0b6a4 100644
--- a/runtime/vm/locations.cc
+++ b/runtime/vm/locations.cc
@@ -46,7 +46,7 @@ LocationSummary* LocationSummary::Make(
 
 
 Location Location::RegisterOrConstant(Value* value) {
-  ConstantComp* constant = value->definition()->AsConstant();
+  ConstantInstr* constant = value->definition()->AsConstant();
   return (constant != NULL)
       ? Location::Constant(constant->value())
       : Location::RequiresRegister();
@@ -54,7 +54,7 @@ Location Location::RegisterOrConstant(Value* value) {
 
 
 Location Location::FixedRegisterOrConstant(Value* value, Register reg) {
-  ConstantComp* constant = value->definition()->AsConstant();
+  ConstantInstr* constant = value->definition()->AsConstant();
   return (constant != NULL)
       ? Location::Constant(constant->value())
       : Location::RegisterLocation(reg);