DevTools: [Regression] Callstack frames do not have stripes anymore.

Source/devtools/front_end/inspectorStyle.css

Index: Source/devtools/front_end/inspectorStyle.css
diff --git a/Source/devtools/front_end/inspectorStyle.css b/Source/devtools/front_end/inspectorStyle.css
index 6136389f294442c11f2d515e5517213338aa6afa..50920ba39b3bf93fc20f7c65e30216592b242ac1 100644
--- a/Source/devtools/front_end/inspectorStyle.css
+++ b/Source/devtools/front_end/inspectorStyle.css
@@ -1413,6 +1413,10 @@ iframe.panel.extension {
     white-space: nowrap;
 }
 
+.placard:nth-of-type(2n) {
+    background-color: rgb(234, 243, 255);
+}
+
 .placard.selected {
     background-color: rgb(212, 212, 212);
     background-clip: padding-box;