Revert sending deprecation messages for prefixed gradients.

third_party/WebKit/Source/core/frame/Deprecation.cpp

Index: third_party/WebKit/Source/core/frame/Deprecation.cpp
diff --git a/third_party/WebKit/Source/core/frame/Deprecation.cpp b/third_party/WebKit/Source/core/frame/Deprecation.cpp
index 9f73ac902c2d80f9adb733a1707256d0fd1b9c18..725b5afe7ad21b4590ef4f8311a7655751744fff 100644
--- a/third_party/WebKit/Source/core/frame/Deprecation.cpp
+++ b/third_party/WebKit/Source/core/frame/Deprecation.cpp
@@ -414,24 +414,6 @@ String Deprecation::DeprecationMessage(UseCounter::Feature feature) {
       return willBeRemoved("SVGPathElement.getPathSegAtLength", M62,
                            "5638783282184192");
 
-    case UseCounter::kDeprecatedWebKitLinearGradient:
-      return replacedBy("-webkit-linear-gradient", "linear-gradient");
-
-    case UseCounter::kDeprecatedWebKitRepeatingLinearGradient:
-      return replacedBy("-webkit-repeating-linear-gradient",
-                        "repeating-linear-gradient");
-
-    case UseCounter::kDeprecatedWebKitGradient:
-      return replacedBy("-webkit-gradient",
-                        "linear-gradient or radial-gradient");
-
-    case UseCounter::kDeprecatedWebKitRadialGradient:
-      return replacedBy("-webkit-radial-gradient", "radial-gradient");
-
-    case UseCounter::kDeprecatedWebKitRepeatingRadialGradient:
-      return replacedBy("-webkit-repeating-radial-gradient",
-                        "repeating-radial-gradient");
-
     // Features that aren't deprecated don't have a deprecation message.
     default:
       return String();