DevTools: Grey out outside parts of selection window on timeline overview.

third_party/WebKit/Source/devtools/front_end/timeline/timelinePanel.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 567 matching lines @@
     background-color: #00a;
     border: none;
     opacity: 0.3;
     min-width: 0;
 }
 
 .timeline-utilization-strip.gpu .timeline-graph-bar.gpu-task-foreign {
     background-color: #aaa;
 }
 
-.timeline-cpu-curtain-left, .timeline-cpu-curtain-right {
-    background-color: rgba(210, 210, 210, 0.5);
-    position: absolute;
-    top: 0;
-    height: 100%;
-    z-index: 300;
-}
-
-.timeline-cpu-curtain-left {
-    left: 0;
-}
-
-.timeline-cpu-curtain-right {
-    right: 0;
-}
-
 .image-preview-container {
     background: transparent;
     text-align: left;
     border-spacing: 0;
 }
 
 .image-preview-container img {
     max-width: 100px;
     max-height: 100px;
     background-image: url(Images/checker.png);
@@ skipping 445 matching lines @@
     float: right;
     height: 15px;
     background-color: hsla(43, 84%, 64%, 0.2);
     border-bottom: 1px solid hsl(43, 84%, 64%);
 }
 
 .timeline-tree-view .data-grid .selected .background-bar {
     background-color: rgba(255, 255, 255, 0.25);
     border-bottom-color: transparent;
 }