[DevTools] Turn WebInspector.Panel into a web component.

third_party/WebKit/Source/devtools/front_end/profiler/profilesPanel.css

 /*
  * Copyright (C) 2006, 2007, 2008 Apple Inc.  All rights reserved.
  * Copyright (C) 2009 Anthony Ricaud <rik@webkit.org>
  *
  * 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
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 163 matching lines @@
 .profile-canvas-decoration {
     color: red;
     margin: -14px 0 13px 22px;
     padding-left: 14px;
 }
 
 .profile-canvas-decoration button {
     margin: 0 0 0 10px !important;
 }
 
-.profiles.panel select.chrome-select {
+.panel select.chrome-select {
     font-size: 12px;
     width: 150px;
     margin-left: 10px;
     margin-right: 10px;
 }
 
 button.load-profile {
     margin-left: 20px;
 }
 
@@ skipping 23 matching lines @@
     bottom: 0;
 }
 
 #cpu-profile-flame-chart-overview-grid .resources-dividers-label-bar {
     pointer-events: auto;
 }
 
 .cpu-profile-flame-chart-overview-pane {
     flex: 0 0 80px !important;
 }