Send deprecation messages for prefixed gradients now that it's possible.

third_party/WebKit/LayoutTests/fast/gradients/css3-repeating-linear-gradients.html

Index: third_party/WebKit/LayoutTests/fast/gradients/css3-repeating-linear-gradients.html
diff --git a/third_party/WebKit/LayoutTests/fast/gradients/css3-repeating-linear-gradients.html b/third_party/WebKit/LayoutTests/fast/gradients/css3-repeating-linear-gradients.html
index 6c62a8d11f7b682344b164befdf8cd5360d39316..37dbd3850f076eb96fc3932d63e8bf0f7ad89638 100644
--- a/third_party/WebKit/LayoutTests/fast/gradients/css3-repeating-linear-gradients.html
+++ b/third_party/WebKit/LayoutTests/fast/gradients/css3-repeating-linear-gradients.html
@@ -13,13 +13,11 @@
     }
 
     .linear1 {
-      background-image: -webkit-repeating-linear-gradient(white, black 20%);
-      background-image: -moz-repeating-linear-gradient(white, black 20%);
+      background-image: repeating-linear-gradient(white, black 20%);
     }
     
     .linear2 {
-      background-image: -webkit-repeating-linear-gradient(white 80%, black);
-      background-image: -moz-repeating-linear-gradient(white 80%, black);
+      background-image: repeating-linear-gradient(white 80%, black);
     }
 
     .linear3 {
@@ -28,33 +26,27 @@
     }
 
     .linear4 {
-      background-image: -webkit-repeating-linear-gradient(left, red 10%, blue 30%);
-      background-image: -moz-repeating-linear-gradient(left, red 10%, blue 30%);
+      background-image: repeating-linear-gradient(to right, red 10%, blue 30%);
     }
 
     .linear5 {
-      background-image: -webkit-repeating-linear-gradient(left, red -10%, blue -5%);
-      background-image: -moz-repeating-linear-gradient(left, red -10%, blue -5%);
+      background-image: repeating-linear-gradient(to right, red -10%, blue -5%);
     }
 
     .linear6 {
-      background-image: -webkit-repeating-linear-gradient(left, red -10%, blue 105%);
-      background-image: -moz-repeating-linear-gradient(left, red -10%, blue 105%);
+      background-image: repeating-linear-gradient(to right, red -10%, blue 105%);
     }
 
     .linear7 {
-      background-image: -webkit-repeating-linear-gradient(left, red 90%, blue 105%);
-      background-image: -moz-repeating-linear-gradient(left, red 90%, blue 105%);
+      background-image: repeating-linear-gradient(to right, red 90%, blue 105%);
     }
 
     .linear8 {
-      background-image: -webkit-repeating-linear-gradient(left, red 2em, blue 3em);
-      background-image: -moz-repeating-linear-gradient(left, red 2em, blue 3em);
+      background-image: repeating-linear-gradient(to right, red 2em, blue 3em);
     }
 
     .linear9 {
-      background-image: -webkit-repeating-linear-gradient(left, red, orange, yellow, green, blue, red 60px);
-      background-image: -moz-repeating-linear-gradient(left, red, orange, yellow, green, blue, red 60px);
+      background-image: repeating-linear-gradient(to right, red, orange, yellow, green, blue, red 60px);
     }
 
   </style>