[DevTools] Migrate usages of Target to RuntimeModel where makes sense

third_party/WebKit/Source/devtools/front_end/sources/JavaScriptSourceFrame.js

 /*
  * Copyright (C) 2011 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
@@ skipping 360 matching lines @@
   /**
    * @param {string}  tokenType
    * @return {boolean}
    */
   _isIdentifier(tokenType) {
     return tokenType.startsWith('js-variable') || tokenType.startsWith('js-property') || tokenType === 'js-def';
   }
 
   _getPopoverAnchor(element, event) {
     var target = UI.context.flavor(SDK.Target);
-    var debuggerModel = SDK.DebuggerModel.fromTarget(target);
+    var debuggerModel = target ? target.model(SDK.DebuggerModel) : null;
     if (!debuggerModel || !debuggerModel.isPaused())
       return;
 
     var textPosition = this.textEditor.coordinatesToCursorPosition(event.x, event.y);
     if (!textPosition)
       return;
     var mouseLine = textPosition.startLine;
     var mouseColumn = textPosition.startColumn;
     var textSelection = this.textEditor.selection().normalize();
     if (textSelection && !textSelection.isEmpty()) {
@@ skipping 1112 matching lines @@
       return;
     this.bookmark.clear();
     this.bookmark = null;
   }
 };
 
 Sources.JavaScriptSourceFrame.BreakpointDecoration.bookmarkSymbol = Symbol('bookmark');
 Sources.JavaScriptSourceFrame.BreakpointDecoration._elementSymbolForTest = Symbol('element');
 
 Sources.JavaScriptSourceFrame.continueToLocationDecorationSymbol = Symbol('bookmark');