DevTools: Convert TextEditor from Interface to Abstract class

third_party/WebKit/Source/devtools/front_end/source_frame/SourcesTextEditor.js

 // Copyright (c) 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.
 /**
  * @unrestricted
  */
 SourceFrame.SourcesTextEditor = class extends TextEditor.CodeMirrorTextEditor {
   /**
    * @param {!SourceFrame.SourcesTextEditorDelegate} delegate
    */
@@ skipping 99 matching lines @@
     super.scrollToLine(lineNumber);
     this._scroll();
   }
 
   /**
    * @param {!RegExp} regex
    * @param {?Common.TextRange} range
    */
   highlightSearchResults(regex, range) {
     /**
-     * @this {TextEditor.CodeMirrorTextEditor}
+     * @this {SourceFrame.SourcesTextEditor}
      */
     function innerHighlightRegex() {
       if (range) {
         this.scrollLineIntoView(range.startLine);
         if (range.endColumn > TextEditor.CodeMirrorTextEditor.maxHighlightLength)
           this.setSelection(range);
         else
           this.setSelection(Common.TextRange.createFromLocation(range.startLine, range.startColumn));
       }
       this._tokenHighlighter.highlightSearchResults(regex, range);
@@ skipping 740 matching lines @@
    */
   _setHighlighter(highlighter, selectionStart) {
     var overlayMode = {token: highlighter};
     this._codeMirror.addOverlay(overlayMode);
     this._highlightDescriptor = {overlay: overlayMode, selectionStart: selectionStart};
   }
 };
 
 SourceFrame.SourcesTextEditor.LinesToScanForIndentationGuessing = 1000;
 SourceFrame.SourcesTextEditor.MaximumNumberOfWhitespacesPerSingleSpan = 16;