DevTools: Re-land r169860 with UI fixed (empty boxes and missing Styles toolbar buttons)

Source/devtools/front_end/elementsPanel.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 201 matching lines @@
 }
 
 .styles-section .properties li.not-parsed-ok {
     margin-left: 0;
 }
 
 .styles-section.computed-style .properties li.not-parsed-ok {
     margin-left: -6px;
 }
 
+.styles-section .properties li.filter-match,
+.styles-section .simple-selector.filter-match {
+    background-color: rgba(255, 255, 0, 0.5);
+}
+
+.styles-section .properties li.overloaded.filter-match {
+    background-color: rgba(255, 255, 0, 0.25);
+}
+
 .styles-section .properties li.not-parsed-ok .exclamation-mark {
     display: inline-block;
     position: relative;
     width: 11px;
     height: 10px;
     margin: 0 7px 0 0;
     top: 1px;
     left: -36px; /* outdent to compensate for the top-level property indent */
     -webkit-user-select: none;
     cursor: default;
@@ skipping 191 matching lines @@
 .styles-section .properties .inactive,
 .styles-section .properties .disabled,
 .styles-section .properties .not-parsed-ok:not(.has-ignorable-error) {
     text-decoration: line-through;
 }
 
 .styles-section .properties .has-ignorable-error .webkit-css-property {
     color: inherit;
 }
 
-.styles-section.computed-style .properties {
-    margin-top: 18px;
-}
-
 .styles-section.computed-style .properties .disabled {
     text-decoration: none;
     opacity: 0.5;
 }
 
 .styles-section .properties .implicit,
 .styles-section .properties .inherited {
     opacity: 0.5;
 }
 
 .styles-section .properties .has-ignorable-error {
     color: gray;
 }
 
 .styles-element-state-pane {
-    background-color: rgb(240, 240, 240);
     overflow: hidden;
     margin-top: -56px;
     padding-top: 18px;
     height: 56px;
     -webkit-transition: margin-top 0.1s ease-in-out;
     padding-left: 2px;
 }
 
 .styles-element-state-pane.expanded {
     border-bottom: 1px solid rgb(189, 189, 189);
@@ skipping 109 matching lines @@
     position: absolute;
 }
 
 .sidebar-pane.composite > .body {
     height: 100%;
 }
 
 .sidebar-pane.composite .metrics {
     border-bottom: 1px solid rgb(64%, 64%, 64%);
     height: 206px;
-    display: -webkit-flex;
-    -webkit-flex-direction: column;
+    display: flex;
+    flex-direction: column;
     -webkit-align-items: center;
     -webkit-justify-content: center;
 }
 
+.sidebar-pane .metrics-and-styles,
+.sidebar-pane .metrics-and-computed {
+    display: flex !important;
+    flex-direction: column !important;
+    position: relative;
+}
+
+.sidebar-pane .style-panes-wrapper {
+    flex: 1;
+    overflow-y: auto;
+    position: relative;
+}
+
+.sidebar-pane.composite .metrics-and-computed .sidebar-pane-toolbar,
+.sidebar-pane.composite .metrics-and-styles .sidebar-pane-toolbar {
+    position: absolute;
+}
+
+input.filter-box {
+    outline: none !important;
+}
+
+.sidebar-pane .filter-box-container > .filter-box {
+    margin: 1px 1px 1px 2px;
+}
+
 .sidebar-pane.composite .metrics-and-computed .sidebar-pane-toolbar {
     margin-top: 4px;
     margin-bottom: -4px;
     position: relative;
 }
 
 .sidebar-pane.composite .platform-fonts .body {
     padding: 1ex;
     -webkit-user-select: text;
 }
@@ skipping 16 matching lines @@
 
 .sidebar-pane.composite .platform-fonts .font-stats-item .delimeter {
     margin: 0 1ex 0 1ex;
 }
 
 .sidebar-pane.composite .metrics-and-styles .metrics {
     border-bottom: none;
 }
 
 .styles-section.computed-style > .header > .sidebar-pane-subtitle {
-    top: 4px;
-    left: 8px;
+    line-height: 17px;
+    margin: 2px;
     -webkit-user-select: none;
 }
 
 .styles-section.computed-style > .header > .sidebar-pane-subtitle > input {
     vertical-align: middle;
 }
 
 .sidebar-pane.composite .sidebar-pane-toolbar > .sidebar-pane-subtitle {
     left: 8px;
 }
@@ skipping 50 matching lines @@
 
 .styles-clipboard-only {
     display: inline-block;
     width: 0;
     opacity: 0;
 }
 
 li.child-editing .styles-clipboard-only {
     display: none;
 }