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

third_party/WebKit/Source/devtools/front_end/network/RequestHeadersView.js

 /*
  * Copyright (C) 2007, 2008 Apple Inc.  All rights reserved.
  * Copyright (C) IBM Corp. 2009  All rights reserved.
  * Copyright (C) 2010 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:
  *
  * 1.  Redistributions of source code must retain the above copyright
@@ skipping 111 matching lines @@
                     value = decodeURIComponent(value);
                 } catch (e) {
                     errorDecoding = true;
                 }
             }
         }
         var div = createElementWithClass("div", className);
         if (value === "")
             div.classList.add("empty-value");
         if (errorDecoding)
-            div.createChild("span", "error-message").textContent = WebInspector.UIString("(unable to decode value)");
+            div.createChild("span", "header-decode-error").textContent = WebInspector.UIString("(unable to decode value)");
         else
             div.textContent = value;
         return div;
     },
 
     _refreshURL: function()
     {
         this._urlItem.title = this._formatHeader(WebInspector.UIString("Request URL"), this._request.url);
     },
 
@@ skipping 387 matching lines @@
         this._expandedSetting.set(true);
     },
 
     oncollapse: function()
     {
         this._expandedSetting.set(false);
     },
 
     __proto__: TreeElement.prototype
 }