Move object literal checking into checker classes

src/arm/full-codegen-arm.cc

Index: src/arm/full-codegen-arm.cc
diff --git a/src/arm/full-codegen-arm.cc b/src/arm/full-codegen-arm.cc
index d18390d97a2889962c6d51cfb672dcf7efb78cae..d6598d8d2afc37703a9fbcc8bea5efbb3ac8c590 100644
--- a/src/arm/full-codegen-arm.cc
+++ b/src/arm/full-codegen-arm.cc
@@ -1747,11 +1747,8 @@ void FullCodeGenerator::VisitObjectLiteral(ObjectLiteral* expr) {
         __ ldr(r0, MemOperand(sp));
         __ push(r0);
         VisitForStackValue(value);
-        if (property->emit_store()) {
-          __ CallRuntime(Runtime::kInternalSetPrototype, 2);
-        } else {
-          __ Drop(2);
-        }
+        DCHECK(property->emit_store());
+        __ CallRuntime(Runtime::kInternalSetPrototype, 2);
         break;
 
       case ObjectLiteral::Property::GETTER:
@@ -1804,11 +1801,8 @@ void FullCodeGenerator::VisitObjectLiteral(ObjectLiteral* expr) {
     if (property->kind() == ObjectLiteral::Property::PROTOTYPE) {
       DCHECK(!property->is_computed_name());
       VisitForStackValue(value);
-      if (property->emit_store()) {
-        __ CallRuntime(Runtime::kInternalSetPrototype, 2);
-      } else {
-        __ Drop(2);
-      }
+      DCHECK(property->emit_store());
+      __ CallRuntime(Runtime::kInternalSetPrototype, 2);
     } else {
       EmitPropertyKey(property);
       VisitForStackValue(value);
@@ -2557,8 +2551,9 @@ void FullCodeGenerator::EmitClassDefineProperties(ClassLiteral* lit) {
     switch (property->kind()) {
       case ObjectLiteral::Property::CONSTANT:
       case ObjectLiteral::Property::MATERIALIZED_LITERAL:
-      case ObjectLiteral::Property::COMPUTED:
       case ObjectLiteral::Property::PROTOTYPE:
+        UNREACHABLE();
+      case ObjectLiteral::Property::COMPUTED:
         __ CallRuntime(Runtime::kDefineClassMethod, 3);
         break;