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

Source/devtools/front_end/inspectorCommon.css

 html {
     height: 100%;
 }
 
 body {
     cursor: default;
     position: absolute;
     top: 0;
     bottom: 0;
     left: 0;
@@ skipping 138 matching lines @@
     background-color: rgba(125, 173, 217, 0.5);
     z-index: 250;
 }
 
 .overview-grid-window {
     background-color: white;
     position: absolute;
     left: 0;
     right: 0;
     top: 0;
-    bottom: 60px;
+    height: 20px;
     z-index: 150;
 }
 
 .overview-grid-dividers-background {
     left: 0%;
     right: 0%;
     top: 0px;
-    bottom: 60px;
+    height: 20px;
     background-color: black;
     position: absolute;
 }
 
 .overview-grid-window-rulers {
     top: 0;
     bottom: 0;
     position: absolute;
     opacity: 0.2;
     border-right: 1px solid black;
     border-left: 1px solid black;
     z-index: 150;
     pointer-events: none;
 }
 
 .overview-grid-window-resizer {
     position: absolute;
     top: 0px;
-    bottom: 60px;
+    height: 20px;
     width: 5px;
     margin-left: -3px;
     margin-right: -2px;
     background-color: rgb(153, 153, 153);
     z-index: 500;
     cursor: ew-resize;
     -webkit-border-radius: 2px;
     -webkit-box-shadow: white 1px 0 0, white -1px 0 0, white 0 1px 0, white 0 -1px 0;
 }
 
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     white-space: nowrap;
     text-overflow: ellipsis;
     overflow: hidden;
     line-height: 16px;
 }
 
 .sidebar-label {
     font-size: 11px;
 }