Move object literal checking into checker classes

src/x87/full-codegen-x87.cc

Index: src/x87/full-codegen-x87.cc
diff --git a/src/x87/full-codegen-x87.cc b/src/x87/full-codegen-x87.cc
index 13a67925129263989518dd6de65f1aecdbb1fa13..a97020e9addfe045cd3d80d14e673363f501c320 100644
--- a/src/x87/full-codegen-x87.cc
+++ b/src/x87/full-codegen-x87.cc
@@ -1662,11 +1662,8 @@ void FullCodeGenerator::VisitObjectLiteral(ObjectLiteral* expr) {
       case ObjectLiteral::Property::PROTOTYPE:
         __ push(Operand(esp, 0));  // Duplicate receiver.
         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:
         accessor_table.lookup(key)->second->getter = value;
@@ -1715,11 +1712,8 @@ 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);