Indent media queries in CSS files for the DevTools.

Source/devtools/front_end/dataGrid.css

Index: Source/devtools/front_end/dataGrid.css
diff --git a/Source/devtools/front_end/dataGrid.css b/Source/devtools/front_end/dataGrid.css
index 020b727d3df2637713bc0eb38c6492d2d014e36d..c95575ed5969053c0aa1491e4487fc3969660eac 100644
--- a/Source/devtools/front_end/dataGrid.css
+++ b/Source/devtools/front_end/dataGrid.css
@@ -168,7 +168,7 @@
 .data-grid th.sort-descending > div::after {
     background-image: url(Images/statusbarButtonGlyphs2x.png);
 }
-}
+} /* media */
 
 .data-grid th.sort-ascending > div::after {
     background-position: -4px -108px;
@@ -212,7 +212,7 @@ body.inactive .data-grid th.sort-descending {
 .data-grid tr.parent td.disclosure::before {
     -webkit-mask-image: url(Images/statusbarButtonGlyphs2x.png);
 }
-}
+} /* media */
 
 .data-grid tr.expanded td.disclosure::before {
     -webkit-mask-position: -20px -96px;