DevTools: [SASS] introduce sass module, implement SCSS AST-builder.

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

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
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     /**
      * @param {string} text
      * @param {string} replacement
      * @return {string}
      */
     replaceInText: function(text, replacement)
     {
         var sourceRange = this.toSourceRange(text);
         return text.substring(0, sourceRange.offset) + replacement + text.substring(sourceRange.offset + sourceRange.length);
+    },
+
+    /**
+     * @param {string} text
+     * @return {string}
+     */
+    extract: function(text)
+    {
+        var sourceRange = this.toSourceRange(text);
+        return text.substr(sourceRange.offset, sourceRange.length);
+    },
+
+    /**
+     * @param {number} lineNumber
+     * @param {number} columnNumber
+     * @return {boolean}
+     */
+    containsLocation: function(lineNumber, columnNumber)
+    {
+        if (this.startLine === this.endLine)
+            return this.startLine === lineNumber && this.startColumn <= columnNumber && columnNumber <= this.endColumn;
+        if (this.startLine === lineNumber)
+            return this.startColumn <= columnNumber;
+        if (this.endLine === lineNumber)
+            return columnNumber <= this.endColumn;
+        return this.startLine < lineNumber && lineNumber < this.endLine;
     }
 }
 
 /**
  * @constructor
  * @param {number} offset
  * @param {number} length
  */
 WebInspector.SourceRange = function(offset, length)
 {
     this.offset = offset;
     this.length = length;
 }