DevTools: Show screenshots on the main flamechart

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 461 matching lines @@
 
 .timeline-paint-profiler-log-split > div:last-child {
     background-color: #eee;
     z-index: 0;
 }
 
 .timeline-gap {
     flex: none;
 }
 
-.timeline-filmstrip-preview {
-    margin-top: 10px;
-    max-width: 200px;
-    max-height: 200px;
+.timeline-filmstrip-preview > img {
+    margin-top: 5px;
+    max-width: 500px;
+    max-height: 300px;
     cursor: pointer;
     border: 1px solid #ddd;
 }
 
 .timeline-tree-view {
     display: flex;
     overflow: hidden;
 }
 
 .timeline-tree-view .toolbar {
@@ skipping 168 matching lines @@
 
 .timeline-landing-warning-close {
     float: right;
     margin-top: -10px;
     margin-right: -13px;
 }
 
 .timeline-landing-warning span[is=ui-icon] {
     margin: -8px;
 }