DevTools: Make item info follow the mouse on the flame chart.

third_party/WebKit/Source/devtools/front_end/ui_lazy/flameChart.css

 .flame-chart-main-pane {
     overflow: hidden;
 }
 
 .flame-chart-marker-highlight-element {
     position: absolute;
     top: 0;
     height: 20px;
     width: 4px;
     margin: 0 -2px;
@@ skipping 41 matching lines @@
 }
 
 .flame-chart-selection-overlay .time-span {
     white-space: nowrap;
     position: absolute;
     left: 0;
     right: 0;
     bottom: 0;
 }
 
-.flame-chart-entry-info {
+.flame-chart-entry-info:not(:empty) {
+    z-index: 100;
+    margin: 6px 10px;
     position: absolute;
-    bottom: 6px;
-    left: 12px;
-    background-color: rgba(255, 255, 255, 0.7);
+    background-color: white;
     pointer-events: none;
+    padding: 2px;
+    border: 1px solid hsl(0, 0%, 90%);
+    box-shadow: hsla(0, 0%, 0%, 0.2) 1px 1px 8px;
+}
+
+.flame-chart-entry-info table tr td {
+    padding: 0;
+    white-space: nowrap;
+}
+
+.flame-chart-entry-info table tr td:not(:empty) {
+    padding: 0 4px;
 }
 
 .flame-chart-entry-info table tr td:first-child {
     font-weight: bold;
-    padding-right: 8px;
 }