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

src/js/messages.js

 // 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.
 
 // -------------------------------------------------------------------
 
 (function(global, utils) {
 
 %CheckIsBootstrapping();
 
@@ skipping 19 matching lines @@
 var Int16x8ToString;
 var Int32x4ToString;
 var Int8x16ToString;
 var InternalArray = utils.InternalArray;
 var internalErrorSymbol = utils.ImportNow("internal_error_symbol");
 var ObjectDefineProperty;
 var ObjectHasOwnProperty;
 var ObjectToString = utils.ImportNow("object_to_string");
 var Script = utils.ImportNow("Script");
 var stackTraceSymbol = utils.ImportNow("stack_trace_symbol");
-var StringCharAt;
 var StringIndexOf;
 var StringSubstring;
 var SymbolToString;
 var toStringTagSymbol = utils.ImportNow("to_string_tag_symbol");
 var Uint16x8ToString;
 var Uint32x4ToString;
 var Uint8x16ToString;
 
 utils.Import(function(from) {
   ArrayJoin = from.ArrayJoin;
   Bool16x8ToString = from.Bool16x8ToString;
   Bool32x4ToString = from.Bool32x4ToString;
   Bool8x16ToString = from.Bool8x16ToString;
   Float32x4ToString = from.Float32x4ToString;
   Int16x8ToString = from.Int16x8ToString;
   Int32x4ToString = from.Int32x4ToString;
   Int8x16ToString = from.Int8x16ToString;
   ObjectDefineProperty = from.ObjectDefineProperty;
   ObjectHasOwnProperty = from.ObjectHasOwnProperty;
-  StringCharAt = from.StringCharAt;
   StringIndexOf = from.StringIndexOf;
   StringSubstring = from.StringSubstring;
   SymbolToString = from.SymbolToString;
   Uint16x8ToString = from.Uint16x8ToString;
   Uint32x4ToString = from.Uint32x4ToString;
   Uint8x16ToString = from.Uint8x16ToString;
 });
 
 // -------------------------------------------------------------------
 
@@ skipping 177 matching lines @@
     } else if (position <= line_ends[i - 1]) {
       upper = i - 1;
     } else {
       return i;
     }
   }
 
   return -1;
 }
 
+
 /**
  * Get information on a specific source position.
  * @param {number} position The source position
  * @param {boolean} include_resource_offset Set to true to have the resource
  *     offset added to the location
  * @return {SourceLocation}
  *     If line is negative or not in the source null is returned.
  */
 function ScriptLocationFromPosition(position,
                                     include_resource_offset) {
   var line = this.lineFromPosition(position);
   if (line == -1) return null;
 
   // Determine start, end and column.
   var line_ends = this.line_ends;
   var start = line == 0 ? 0 : line_ends[line - 1] + 1;
   var end = line_ends[line];
-  if (end > 0 && %_Call(StringCharAt, this.source, end - 1) == '\r') {
+  if (end > 0 && %_StringCharAt(this.source, end - 1) === '\r') {
     end--;
   }
   var column = position - start;
 
   // Adjust according to the offset within the resource.
   if (include_resource_offset) {
     line += this.line_offset;
     if (line == this.line_offset) {
       column += this.column_offset;
     }
@@ skipping 732 matching lines @@
 utils.Export(function(to) {
   to.ErrorToString = ErrorToString;
   to.MakeError = MakeError;
   to.MakeRangeError = MakeRangeError;
   to.MakeSyntaxError = MakeSyntaxError;
   to.MakeTypeError = MakeTypeError;
   to.MakeURIError = MakeURIError;
 });
 
 });