DevTools: Fix timeline flamechart popover style.

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 62 matching lines @@
 
 .flame-chart-selection-overlay .time-span {
     white-space: nowrap;
     position: absolute;
     left: 0;
     right: 0;
     bottom: 0;
 }
 
 .flame-chart-entry-info:not(:empty) {
-    z-index: 200;
+    z-index: 2000;
     position: absolute;
     background-color: white;
     pointer-events: none;
-    padding: 2px;
+    padding: 4px 8px;
+    white-space: nowrap;
+    max-width: 80%;
     box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.05),
                 0 2px 4px rgba(0, 0, 0, 0.2),
                 0 2px 6px rgba(0, 0, 0, 0.1);
 }
 
 .flame-chart-entry-info table tr td:empty {
     padding: 0;
 }
 
 .flame-chart-entry-info table tr td:not(:empty) {
     padding: 0 5px;
     white-space: nowrap;
 }
 
 .flame-chart-entry-info table tr td:first-child {
     font-weight: bold;
 }
 
 .flame-chart-entry-info table tr td span {
     margin-right: 5px;
 }