ParserBase: Simplify FuncNameInferrer handling.

src/parsing/preparser.h

 // Copyright 2012 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_PARSING_PREPARSER_H
 #define V8_PARSING_PREPARSER_H
 
 #include "src/ast/scopes.h"
 #include "src/parsing/parser-base.h"
 
@@ skipping 888 matching lines @@
     return false;
   }
 
   V8_INLINE static PreParserExpression GetPropertyValue(
       PreParserExpression property) {
     return PreParserExpression::Default();
   }
 
   // Functions for encapsulating the differences between parsing and preparsing;
   // operations interleaved with the recursive descent.
-  V8_INLINE static void PushLiteralName(FuncNameInferrer* fni,
-                                        PreParserIdentifier id) {
-    // PreParser should not use FuncNameInferrer.
-    UNREACHABLE();
-  }
-
-  V8_INLINE static void PushVariableName(FuncNameInferrer* fni,
-                                         PreParserIdentifier id) {
-    // PreParser should not use FuncNameInferrer.
-    UNREACHABLE();
-  }
-
-  V8_INLINE void PushPropertyName(FuncNameInferrer* fni,
-                                  PreParserExpression expression) {
-    // PreParser should not use FuncNameInferrer.
-    UNREACHABLE();
-  }
-
-  V8_INLINE static void InferFunctionName(FuncNameInferrer* fni,
-                                          PreParserExpression expression) {
-    // PreParser should not use FuncNameInferrer.
-    UNREACHABLE();
-  }
+  V8_INLINE static void PushLiteralName(PreParserIdentifier id) {}
+  V8_INLINE static void PushVariableName(PreParserIdentifier id) {}
+  V8_INLINE void PushPropertyName(PreParserExpression expression) {}
+  V8_INLINE static void InferFunctionName(PreParserExpression expression) {}
 
   V8_INLINE static void CheckAssigningFunctionLiteralToProperty(
       PreParserExpression left, PreParserExpression right) {}
 
   V8_INLINE static PreParserExpression MarkExpressionAsAssigned(
       PreParserExpression expression) {
     // TODO(marja): To be able to produce the same errors, the preparser needs
     // to start tracking which expressions are variables and which are assigned.
     return expression;
   }
@@ skipping 267 matching lines @@
     function_state_->NextMaterializedLiteralIndex();
     function_state_->NextMaterializedLiteralIndex();
   }
   return EmptyExpression();
 }
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_PARSING_PREPARSER_H