[DevTools] Prepare to move Popover to shadow DOM.

third_party/WebKit/Source/devtools/front_end/sources/sourcesPanel.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 37 matching lines @@
 .scripts-debug-toolbar-drawer.expanded {
     margin-top: 0;
 }
 
 .scripts-debug-toolbar-drawer > label {
     display: flex;
     padding-left: 3px;
     height: 28px;
 }
 
-.function-location-link {
-    float: right;
-    margin-left: 10px;
-}
-
-.function-location-step-into {
-    position: relative;
-    height: 14px;
-    transform: rotate(-90deg);
-}
-
-.object-popover-container {
-    display: inline-block;
-}
-
-.function-popover-title {
-    border-bottom: 1px solid #AAA;
-    margin-bottom: 3px;
-    padding-bottom: 2px;
-    display: flex;
-    justify-content: space-between;
-    align-items: center;
-}
-
-.function-title-link-container {
-    display: flex;
-    align-items: center;
-    position: relative;
-    margin-left: 10px;
-}
-
-.function-popover-title .function-name {
-    font-weight: bold;
-}
-
 .panel.sources .sidebar-pane-stack {
     overflow: auto;
 }
 
 .cursor-pointer {
     cursor: pointer;
 }
 
 .cursor-auto {
     cursor: auto;
@@ skipping 133 matching lines @@
 }
 
 .scope-chain-sidebar-pane-section {
     padding: 2px 4px 2px 4px;
     flex: none;
 }
 
 .event-listeners-sidebar-pane .toolbar {
     border-bottom: 1px solid #eee;
 }