Remove all usage of -webkit-*gradient inside blink

Source/devtools/front_end/dialog.css

Index: Source/devtools/front_end/dialog.css
diff --git a/Source/devtools/front_end/dialog.css b/Source/devtools/front_end/dialog.css
index a82792c82a88bb07b870068f25a74e22ffb40bd0..ff93919a4615b8c087ff8537735a86b6a62cef37 100644
--- a/Source/devtools/front_end/dialog.css
+++ b/Source/devtools/front_end/dialog.css
@@ -10,7 +10,7 @@
     display: -webkit-flex;
     -webkit-flex-direction: column;
     
-    background-image: -webkit-gradient(linear, 0% 0%, 0% 100%, from(#E9E9E9), to(#CFCFCF));
+    background-image: linear-gradient(to bottom, #E9E9E9, #CFCFCF);
 }
 
 .dialog-contents {
@@ -31,7 +31,7 @@
     color: rgb(6, 6, 6);
     border: 1px solid rgb(165, 165, 165);
     background-color: rgb(237, 237, 237);
-    background-image: -webkit-gradient(linear, left top, left bottom, from(rgb(252, 252, 252)), to(rgb(223, 223, 223)));
+    background-image: linear-gradient(to bottom, rgb(252, 252, 252), rgb(223, 223, 223));
     border-radius: 12px;
     -webkit-appearance: none;
 
@@ -41,6 +41,6 @@
 
 .go-to-line-dialog button:active {
     background-color: rgb(215, 215, 215);
-    background-image: -webkit-gradient(linear, left top, left bottom, from(rgb(194, 194, 194)), to(rgb(239, 239, 239)));
+    background-image: linear-gradient(to bottom, rgb(194, 194, 194), rgb(239, 239, 239));
 }