Remove all usage of -webkit-*gradient inside blink

Source/devtools/front_end/resourcesPanel.css

Index: Source/devtools/front_end/resourcesPanel.css
diff --git a/Source/devtools/front_end/resourcesPanel.css b/Source/devtools/front_end/resourcesPanel.css
index 84de922f96f2138d779b4a01ff60eb4688d576b4..baeac74ef46d44382fbac8d7aa78b24603431229 100644
--- a/Source/devtools/front_end/resourcesPanel.css
+++ b/Source/devtools/front_end/resourcesPanel.css
@@ -47,18 +47,18 @@
 }
 
 .resources.panel .sidebar li.selected .selection {
-    background-image: -webkit-gradient(linear, left top, left bottom, from(rgb(162, 177, 207)), to(rgb(120, 138, 177)));
+    background-image: linear-gradient(to bottom, rgb(162, 177, 207), rgb(120, 138, 177));
     border-top: 1px solid #979797;
     height: 18px;
 }
 
 .resources.panel .sidebar :focus li.selected .selection {
-    background-image: -webkit-gradient(linear, left top, left bottom, from(rgb(92, 147, 213)), to(rgb(21, 83, 170)));
+    background-image: linear-gradient(to bottom, rgb(92, 147, 213), rgb(21, 83, 170));
     border-top: 1px solid rgb(68, 128, 200);
 }
 
 body.inactive .resources.panel .sidebar li.selected .selection {
-    background-image: -webkit-gradient(linear, left top, left bottom, from(rgb(180, 180, 180)), to(rgb(138, 138, 138)));
+    background-image: linear-gradient(to bottom, rgb(180, 180, 180), rgb(138, 138, 138));
     border-top: 1px solid rgb(151, 151, 151);
 }