DevTools: Convert TextEditor from Interface to Abstract class

third_party/WebKit/Source/devtools/front_end/text_editor/CodeMirrorTextEditor.js

Index: third_party/WebKit/Source/devtools/front_end/text_editor/CodeMirrorTextEditor.js
diff --git a/third_party/WebKit/Source/devtools/front_end/text_editor/CodeMirrorTextEditor.js b/third_party/WebKit/Source/devtools/front_end/text_editor/CodeMirrorTextEditor.js
index 41d0d9ba36d49fce89744efb2f175f76520b572d..e51fba872130665a832caf2abe45e7b04efb7a15 100644
--- a/third_party/WebKit/Source/devtools/front_end/text_editor/CodeMirrorTextEditor.js
+++ b/third_party/WebKit/Source/devtools/front_end/text_editor/CodeMirrorTextEditor.js
@@ -28,10 +28,9 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 /**
- * @implements {UI.TextEditor}
  * @unrestricted
  */
-TextEditor.CodeMirrorTextEditor = class extends UI.VBox {
+TextEditor.CodeMirrorTextEditor = class extends UI.TextEditor {
   /**
    * @param {!UI.TextEditor.Options} options
    */
@@ -380,14 +379,6 @@ TextEditor.CodeMirrorTextEditor = class extends UI.VBox {
     return this._codeMirror;
   }
 
-  /**
-   * @override
-   * @return {!UI.Widget}
-   */
-  widget() {
-    return this;
-  }
-
   _onKeyHandled() {
     UI.shortcutRegistry.dismissPendingShortcutAction();
   }