[compiler] Remove the special case "prototype" load in class literals.

src/compiler/ast-graph-builder.h

 // 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.
 
 #ifndef V8_COMPILER_AST_GRAPH_BUILDER_H_
 #define V8_COMPILER_AST_GRAPH_BUILDER_H_
 
 #include "src/ast/ast.h"
 #include "src/compiler/js-graph.h"
 #include "src/compiler/liveness-analyzer.h"
@@ skipping 302 matching lines @@
                         TypeofMode typeof_mode);
   Node* BuildGlobalStore(Handle<Name> name, Node* value,
                          const VectorSlotPair& feedback);
 
   // Builders for accessing the function context.
   Node* BuildLoadGlobalObject();
   Node* BuildLoadNativeContextField(int index);
   Node* BuildLoadFeedbackVector();
 
   // Builder for accessing a (potentially immutable) object field.
-  Node* BuildLoadObjectField(Node* object, int offset);
   Node* BuildLoadImmutableObjectField(Node* object, int offset);
 
   // Builders for automatic type conversion.
   Node* BuildToBoolean(Node* input, TypeFeedbackId feedback_id);
   Node* BuildToName(Node* input, BailoutId bailout_id);
   Node* BuildToObject(Node* input, BailoutId bailout_id);
 
   // Builder for adding the [[HomeObject]] to a value if the value came from a
   // function literal and needs a home object. Do nothing otherwise.
   Node* BuildSetHomeObject(Node* value, Node* home_object,
@@ skipping 250 matching lines @@
 
   // Prepare environment to be used as loop header.
   void PrepareForLoop(BitVector* assigned, bool is_osr = false);
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_AST_GRAPH_BUILDER_H_