[DevTools] Remove a bunch of styles from inspectorStyle.css.

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

 /*
  * Copyright (C) IBM Corp. 2009  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 349 matching lines @@
         this._result = result;
 
         var headerElement = createElementWithClass("div", "watch-expression-header");
         var deleteButton = headerElement.createChild("button", "watch-expression-delete-button");
         deleteButton.title = WebInspector.UIString("Delete watch expression");
         deleteButton.addEventListener("click", this._deleteWatchExpression.bind(this), false);
 
         var titleElement = headerElement.createChild("div", "watch-expression-title");
         this._nameElement = WebInspector.ObjectPropertiesSection.createNameElement(this._expression);
         if (!!exceptionDetails || !result) {
-            this._valueElement = createElementWithClass("span", "error-message value");
+            this._valueElement = createElementWithClass("span", "watch-expression-error value");
             titleElement.classList.add("dimmed");
             this._valueElement.textContent = WebInspector.UIString("<not available>");
         } else {
             this._valueElement = WebInspector.ObjectPropertiesSection.createValueElementWithCustomSupport(result, !!exceptionDetails, titleElement, this._linkifier);
         }
         var separatorElement = createElementWithClass("span", "watch-expressions-separator");
         separatorElement.textContent = ": ";
         titleElement.appendChildren(this._nameElement, separatorElement, this._valueElement);
 
         this._element.removeChildren();
@@ skipping 69 matching lines @@
             contextMenu.appendApplicableItems(this._result);
     },
 
     _copyValueButtonClicked: function()
     {
         InspectorFrontendHost.copyText(this._valueElement.textContent);
     },
 
     __proto__: WebInspector.Object.prototype
 }