[DevTools] Remove HelpScreen, turn SettingsScreen into dialog and web component.

third_party/WebKit/Source/devtools/front_end/inspectorStyle.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 539 matching lines @@
     position: absolute !important;
     left: 0;
     top: 0;
     right: 0;
     bottom: 0;
 }
 
 .viewport-control-gap-element {
     color: transparent;
 }
-
-.chrome-select {
-    -webkit-appearance: none;
-    -webkit-user-select: none;
-    border: 1px solid rgba(0, 0, 0, 0.25);
-    border-radius: 2px;
-    box-shadow: 0 1px 0 rgba(0, 0, 0, 0.08),
-    inset 0 1px 2px rgba(255, 255, 255, 0.75);
-    color: #444;
-    font: inherit;
-    margin: 0 1px 0 0;
-    outline: none;
-    text-shadow: 0 1px 0 rgb(240, 240, 240);
-    padding-right: 20px;
-    padding-left: 6px;
-    background-image: -webkit-image-set(url(Images/chromeSelect.png) 1x, url(Images/chromeSelect_2x.png) 2x), linear-gradient(#ededed, #ededed 38%, #dedede);
-    background-position: right center;
-    background-repeat: no-repeat;
-    min-height: 24px;
-}
-
-.chrome-select:enabled:hover {
-    background-image: -webkit-image-set(url(Images/chromeSelect.png) 1x, url(Images/chromeSelect_2x.png) 2x), linear-gradient(#f0f0f0, #f0f0f0 38%, #e0e0e0);
-    border-color: rgba(0, 0, 0, 0.3);
-    box-shadow: 0 1px 0 rgba(0, 0, 0, 0.12),
-    inset 0 1px 2px rgba(255, 255, 255, 0.95);
-    color: black;
-}
-
-.chrome-select:enabled:active {
-    background-image: -webkit-image-set(url(Images/chromeSelect.png) 1x, url(Images/chromeSelect_2x.png) 2x), linear-gradient(#e7e7e7, #e7e7e7 38%, #d7d7d7);
-    box-shadow: none;
-    text-shadow: none;
-}
-
-.chrome-select:enabled:focus {
-    /* OVERRIDE */
-    -webkit-transition: border-color 200ms;
-    /* We use border color because it follows the border radius (unlike outline).
-     * This is particularly noticeable on mac. */
-    border-color: rgb(77, 144, 254);
-    outline: none;
-}
-
-body.inactive select.chrome-select,
-.chrome-select:disabled {
-    background-image: -webkit-image-set(url(Images/chromeDisabledSelect.png) 1x, url(Images/chromeDisabledSelect_2x.png) 2x), linear-gradient(#f1f1f1, #f1f1f1 38%, #e6e6e6);
-    border-color: rgba(80, 80, 80, 0.2);
-    box-shadow: 0 1px 0 rgba(80, 80, 80, 0.08),
-    inset 0 1px 2px rgba(255, 255, 255, 0.75);
-    color: #aaa;
-}