[stubs] KeyedLoadIC_Megamorphic: support getters

src/code-stub-assembler.h

 // Copyright 2016 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.
 
 #ifndef V8_CODE_STUB_ASSEMBLER_H_
 #define V8_CODE_STUB_ASSEMBLER_H_
 
 #include <functional>
 
 #include "src/compiler/code-assembler.h"
@@ skipping 734 matching lines @@
                                   FixedArray::kHeaderSize);
   }
 
  private:
   enum ElementSupport { kOnlyProperties, kSupportElements };
 
   void DescriptorLookupLinear(compiler::Node* unique_name,
                               compiler::Node* descriptors, compiler::Node* nof,
                               Label* if_found, Variable* var_name_index,
                               Label* if_not_found);
+  void ReturnValueOrCallGetter(Variable* var_value, Variable* var_details,
+                               compiler::Node* context,
+                               compiler::Node* receiver, Label* if_success,
+                               Label* if_bailout);
 
   void HandleLoadICHandlerCase(
       const LoadICParameters* p, compiler::Node* handler, Label* miss,
       ElementSupport support_elements = kOnlyProperties);
   compiler::Node* TryToIntptr(compiler::Node* key, Label* miss);
   void EmitFastElementsBoundsCheck(compiler::Node* object,
                                    compiler::Node* elements,
                                    compiler::Node* intptr_index,
                                    compiler::Node* is_jsarray_condition,
                                    Label* miss);
@@ skipping 37 matching lines @@
                                            Label* bailout);
 
   static const int kElementLoopUnrollThreshold = 8;
 };
 
 DEFINE_OPERATORS_FOR_FLAGS(CodeStubAssembler::AllocationFlags);
 
 }  // namespace internal
 }  // namespace v8
 #endif  // V8_CODE_STUB_ASSEMBLER_H_