DevTools: [TrackingHeapProfiler] Provide a chart with living heap date at recording time.

Source/devtools/front_end/heapProfiler.css

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  * Copyright (C) 2010 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 253 matching lines @@
 }
 
 .cycled-ancessor-node {
     opacity: 0.6;
 }
 
 #heap-recording-view .heap-snapshot-view {
     top: 80px;
 }
 
-.overview-container {
-    overflow: hidden;
-    position: absolute;
-    top: 0px;
-    width: 100%;
-    height: 80px;
-}
-
 #heap-recording-overview-grid .resources-dividers-label-bar {
     pointer-events: auto;
 }
 
-#heap-recording-overview-container {
-    border-bottom: 1px solid rgba(0, 0, 0, 0.3);
-}
-
 .heap-recording-overview-canvas {
     position: absolute;
     top: 20px;
     left: 0;
     right: 0;
     bottom: 0;
 }
+
+#profile-views .heap-snapshot-view #heap-recording-view .overview-container {
+    height: 80px;
+}
+
+#profile-views #heap-recording-view .overview-container {
+    height: 100%;
+}