DevTools: the sources debug toolbar buttons should not be drag targets

third_party/WebKit/Source/devtools/front_end/ui/Toolbar.js

 /*
  * Copyright (C) 2009 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 176 matching lines @@
   /**
    * @param {string} actionId
    * @return {!UI.ToolbarToggle}
    */
   static createActionButtonForId(actionId) {
     const action = UI.actionRegistry.action(actionId);
     return UI.Toolbar.createActionButton(/** @type {!UI.Action} */ (action));
   }
 
   /**
+   * @return {!Element}
+   */
+  contentElement() {

[pfeldman, 2017/06/01 21:26:56]

Let's be more specific and name it gripElementForResize() in order to maintain
illusion of shadow encapsulation.

[luoe, 2017/06/01 21:32:07]

Done, good idea.

+    return this._contentElement;
+  }
+
+  /**
    * @param {boolean=} reverse
    * @param {boolean=} growVertically
    */
   makeWrappable(reverse, growVertically) {
     this._contentElement.classList.add('wrappable');
     this._reverse = !!reverse;
     if (reverse)
       this._contentElement.classList.add('wrappable-reverse');
     if (growVertically)
       this._contentElement.classList.add('toolbar-grow-vertical');
@@ skipping 855 matching lines @@
   /**
    * @param {!Common.Setting} setting
    * @param {string=} tooltip
    * @param {string=} alternateTitle
    */
   constructor(setting, tooltip, alternateTitle) {
     super(alternateTitle || setting.title() || '', tooltip);
     UI.SettingsUI.bindCheckbox(this.inputElement, setting);
   }
 };