Revert of [builtins] Migrate String.prototype.charCodeAt and String.prototype.charAt to TurboFan.

src/builtins.h

 // Copyright 2011 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_BUILTINS_H_
 #define V8_BUILTINS_H_
 
 #include "src/base/flags.h"
 #include "src/handles.h"
 
@@ skipping 295 matching lines @@
 #define BUILTIN_LIST_T(V)        \
   V(GeneratorPrototypeNext, 2)   \
   V(GeneratorPrototypeReturn, 2) \
   V(GeneratorPrototypeThrow, 2)  \
   V(MathCeil, 2)                 \
   V(MathClz32, 2)                \
   V(MathFloor, 2)                \
   V(MathRound, 2)                \
   V(MathSqrt, 2)                 \
   V(MathTrunc, 2)                \
-  V(ObjectHasOwnProperty, 2)     \
-  V(StringPrototypeCharAt, 2)    \
-  V(StringPrototypeCharCodeAt, 2)
+  V(ObjectHasOwnProperty, 2)
 
 // Define list of builtin handlers implemented in assembly.
 #define BUILTIN_LIST_H(V)                    \
   V(LoadIC_Slow,             LOAD_IC)        \
   V(KeyedLoadIC_Slow,        KEYED_LOAD_IC)  \
   V(StoreIC_Slow,            STORE_IC)       \
   V(KeyedStoreIC_Slow,       KEYED_STORE_IC) \
   V(LoadIC_Normal,           LOAD_IC)        \
   V(StoreIC_Normal,          STORE_IC)
 
@@ skipping 295 matching lines @@
   static void Generate_GeneratorPrototypeReturn(
       compiler::CodeStubAssembler* assembler);
   // ES6 section 25.3.1.4 Generator.prototype.throw ( exception )
   static void Generate_GeneratorPrototypeThrow(
       compiler::CodeStubAssembler* assembler);
 
   // ES6 section 19.1.3.2 Object.prototype.hasOwnProperty
   static void Generate_ObjectHasOwnProperty(
       compiler::CodeStubAssembler* assembler);
 
-  // ES6 section 21.1.3.1 String.prototype.charAt ( pos )
-  static void Generate_StringPrototypeCharAt(
-      compiler::CodeStubAssembler* assembler);
-  // ES6 section 21.1.3.2 String.prototype.charCodeAt ( pos )
-  static void Generate_StringPrototypeCharCodeAt(
-      compiler::CodeStubAssembler* assembler);
-
   static void Generate_StringConstructor(MacroAssembler* masm);
   static void Generate_StringConstructor_ConstructStub(MacroAssembler* masm);
   static void Generate_OnStackReplacement(MacroAssembler* masm);
   static void Generate_InterruptCheck(MacroAssembler* masm);
   static void Generate_StackCheck(MacroAssembler* masm);
 
   static void Generate_InterpreterEntryTrampoline(MacroAssembler* masm);
   static void Generate_InterpreterExitTrampoline(MacroAssembler* masm);
   static void Generate_InterpreterPushArgsAndCall(MacroAssembler* masm) {
     return Generate_InterpreterPushArgsAndCallImpl(masm,
@@ skipping 29 matching lines @@
   friend class BuiltinFunctionTable;
   friend class Isolate;
 
   DISALLOW_COPY_AND_ASSIGN(Builtins);
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_BUILTINS_H_