Reland of [DevTools] Migrate SoftContextMenu to use GlassPane

third_party/WebKit/Source/devtools/front_end/inline_editor/SwatchPopoverHelper.js

 // Copyright 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
  */
 InlineEditor.SwatchPopoverHelper = class extends Common.Object {
   constructor() {
     super();
     this._popover = new UI.GlassPane();
     this._popover.registerRequiredCSS('inline_editor/swatchPopover.css');
     this._popover.setBlockPointerEvents(false);
     this._popover.setSizeBehavior(UI.GlassPane.SizeBehavior.MeasureContent);
-    this._popover.setShowArrow(true);
+    this._popover.setMarginBehavior(UI.GlassPane.MarginBehavior.Arrow);
     this._popover.element.addEventListener('mousedown', e => e.consume(), false);
 
     this._hideProxy = this.hide.bind(this, true);
     this._boundOnKeyDown = this._onKeyDown.bind(this);
     this._boundFocusOut = this._onFocusOut.bind(this);
     this._isHidden = true;
   }
 
   /**
    * @param {!Event} event
@@ skipping 83 matching lines @@
       this.hide(true);
       event.consume(true);
       return;
     }
     if (event.key === 'Escape') {
       this.hide(false);
       event.consume(true);
     }
   }
 };