Move object literal checking into checker classes

src/compiler/ast-graph-builder.cc

Index: src/compiler/ast-graph-builder.cc
diff --git a/src/compiler/ast-graph-builder.cc b/src/compiler/ast-graph-builder.cc
index 5e725284f39807983e56efd38900021c65cac5a6..be70afb4f5aa68b76923bb7d580d7ad030a0ac25 100644
--- a/src/compiler/ast-graph-builder.cc
+++ b/src/compiler/ast-graph-builder.cc
@@ -1081,13 +1081,12 @@ void AstGraphBuilder::VisitObjectLiteral(ObjectLiteral* expr) {
         VisitForValue(property->value());
         Node* value = environment()->Pop();
         Node* receiver = environment()->Pop();
-        if (property->emit_store()) {
-          const Operator* op =
-              javascript()->CallRuntime(Runtime::kInternalSetPrototype, 2);
-          Node* set_prototype = NewNode(op, receiver, value);
-          // SetPrototype should not lazy deopt on an object literal.
-          PrepareFrameState(set_prototype, BailoutId::None());
-        }
+        DCHECK(property->emit_store());
+        const Operator* op =
+            javascript()->CallRuntime(Runtime::kInternalSetPrototype, 2);
+        Node* set_prototype = NewNode(op, receiver, value);
+        // SetPrototype should not lazy deopt on an object literal.
+        PrepareFrameState(set_prototype, BailoutId::None());
         break;
       }
       case ObjectLiteral::Property::GETTER: