DevTools: improve identifier extraction in SourceMapNamesResolver

third_party/WebKit/Source/devtools/front_end/common/Text.js

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 /**
  * @constructor
  * @param {string} value
  */
 WebInspector.Text = function(value)
 {
@@ skipping 111 matching lines @@
 
     /**
      * @return {number}
      */
     offset: function()
     {
         return this._offset;
     },
 
     /**
+     * @param {number} offset
+     */
+    resetTo: function(offset)
+    {
+        this._offset = offset;
+        this._lineNumber = this._lineEndings.lowerBound(offset);
+        this._columnNumber = this._lineNumber ? this._offset - this._lineEndings[this._lineNumber - 1] - 1 : this._offset;
+    },
+
+    /**
      * @return {number}
      */
     lineNumber: function()
     {
         return this._lineNumber;
     },
 
     /**
      * @return {number}
      */
     columnNumber: function()
     {
         return this._columnNumber;
     }
 }