[DevTools] Prepare to move Popover to shadow DOM.

third_party/WebKit/Source/devtools/front_end/components/DOMPresentationUtils.js

 /*
  * Copyright (C) 2011 Google Inc.  All rights reserved.
  * Copyright (C) 2007, 2008 Apple Inc.  All rights reserved.
  * Copyright (C) 2008 Matt Lilek <webkit@mattlilek.com>
  * Copyright (C) 2009 Joseph Pecoraro
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
@@ skipping 171 matching lines @@
   /**
    * @param {?SDK.Resource} resource
    * @return {boolean}
    */
   function isImageResource(resource) {
     return !!resource && resource.resourceType() === Common.resourceTypes.Image;
   }
 
   function buildContent() {
     var container = createElement('table');
+    UI.appendStyle(container, 'components/imagePreview.css');
     container.className = 'image-preview-container';
     var naturalWidth = precomputedFeatures ? precomputedFeatures.naturalWidth : imageElement.naturalWidth;
     var naturalHeight = precomputedFeatures ? precomputedFeatures.naturalHeight : imageElement.naturalHeight;
     var offsetWidth = precomputedFeatures ? precomputedFeatures.offsetWidth : naturalWidth;
     var offsetHeight = precomputedFeatures ? precomputedFeatures.offsetHeight : naturalHeight;
     var description;
     if (showDimensions) {
       if (offsetHeight === naturalHeight && offsetWidth === naturalWidth) {
         description = Common.UIString('%d \xd7 %d pixels', offsetWidth, offsetHeight);
       } else {
@@ skipping 438 matching lines @@
 
   /**
    * @override
    * @param {!SDK.DOMNode} node
    * @return {?{title: string, color: string}}
    */
   decorate(node) {
     return {title: this._title, color: this._color};
   }
 };