DevTools: Fix "Unwanted blue dot is seen in 'Performance' section of devtools"

third_party/WebKit/Source/devtools/front_end/perf_ui/timelineOverviewInfo.css

Index: third_party/WebKit/Source/devtools/front_end/perf_ui/timelineOverviewInfo.css
diff --git a/third_party/WebKit/Source/devtools/front_end/perf_ui/timelineOverviewInfo.css b/third_party/WebKit/Source/devtools/front_end/perf_ui/timelineOverviewInfo.css
index bce02d4e312f815d1031b799b715d11e579d30aa..243435ca3dbf096f0ae4f63aa310684859667985 100644
--- a/third_party/WebKit/Source/devtools/front_end/perf_ui/timelineOverviewInfo.css
+++ b/third_party/WebKit/Source/devtools/front_end/perf_ui/timelineOverviewInfo.css
@@ -4,7 +4,7 @@
  * found in the LICENSE file.
  */
 
-.overview-info {
+.overview-info:not(:empty) {
     display: flex;
     background: white;
     box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.2), 0 2px 4px rgba(0, 0, 0, 0.2), 0 2px 6px rgba(0, 0, 0, 0.1);