[strong] Refactor out separate strong runtime call for class objects

src/compiler/ast-graph-builder.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/compiler/ast-graph-builder.h"
 
 #include "src/compiler.h"
 #include "src/compiler/ast-loop-assignment-analyzer.h"
 #include "src/compiler/control-builders.h"
 #include "src/compiler/js-type-feedback.h"
@@ skipping 1625 matching lines @@
         NewNode(op, receiver, key, value, attr);
         break;
       }
     }
   }
 
   // Set both the prototype and constructor to have fast properties, and also
   // freeze them in strong mode.
   environment()->Pop();  // proto
   environment()->Pop();  // literal
-  const Operator* op = javascript()->CallRuntime(
-      is_strong(language_mode()) ? Runtime::kFinalizeClassDefinitionStrong
-                                 : Runtime::kFinalizeClassDefinition,
-      2);
+  const Operator* op =
+      javascript()->CallRuntime(Runtime::kFinalizeClassDefinition, 2);
   literal = NewNode(op, literal, proto);
 
   // Assign to class variable.
   if (expr->scope() != NULL) {
     DCHECK_NOT_NULL(expr->class_variable_proxy());
     Variable* var = expr->class_variable_proxy()->var();
     FrameStateBeforeAndAfter states(this, BailoutId::None());
     VectorSlotPair feedback =
         CreateVectorSlotPair(FLAG_vector_stores && var->IsUnallocated()
                                  ? expr->GetNthSlot(store_slot_index++)
@@ skipping 2645 matching lines @@
     // Phi does not exist yet, introduce one.
     value = NewPhi(inputs, value, control);
     value->ReplaceInput(inputs - 1, other);
   }
   return value;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8