DevTools: [SSP] treat new rules out of style cascade.

third_party/WebKit/Source/devtools/front_end/elements/StylesSidebarPane.js

Index: third_party/WebKit/Source/devtools/front_end/elements/StylesSidebarPane.js
diff --git a/third_party/WebKit/Source/devtools/front_end/elements/StylesSidebarPane.js b/third_party/WebKit/Source/devtools/front_end/elements/StylesSidebarPane.js
index 85e1c913daa3ca0788f19e07db9d45ce7ee8c9de..575099c7d1f8dab96b6edea86352bb713c695215 100644
--- a/third_party/WebKit/Source/devtools/front_end/elements/StylesSidebarPane.js
+++ b/third_party/WebKit/Source/devtools/front_end/elements/StylesSidebarPane.js
@@ -1670,7 +1670,6 @@ WebInspector.BlankStylePropertiesSection = function(stylesPane, cascade, default
     this._selectorRefElement.appendChild(WebInspector.StylePropertiesSection._linkifyRuleLocation(this._parentPane._cssModel, this._parentPane._linkifier, styleSheetId, this._actualRuleLocation()));
     if (insertAfterStyle && insertAfterStyle.parentRule)
         this._createMediaList(insertAfterStyle.parentRule.media);
-    this._insertAfterStyle = insertAfterStyle;
     this.element.classList.add("blank-section");
 }
 
@@ -1778,9 +1777,7 @@ WebInspector.BlankStylePropertiesSection.prototype = {
     _makeNormal: function(newRule)
     {
         this.element.classList.remove("blank-section");
-        this._cascade.insertStyle(newRule.style, this._insertAfterStyle);
         this._style = newRule.style;
-
         // FIXME: replace this instance by a normal WebInspector.StylePropertiesSection.
         this._normal = true;
     },