Enable/Unprefix Animations & Transitions, add basic tests

sky/engine/core/css/parser/CSSTokenizer-in.cpp

Index: sky/engine/core/css/parser/CSSTokenizer-in.cpp
diff --git a/sky/engine/core/css/parser/CSSTokenizer-in.cpp b/sky/engine/core/css/parser/CSSTokenizer-in.cpp
index 5390bee0febe2a6f2ae0be5a75fc2a51aca5713c..b4e47e51d4be6c307f039c0165bdffd6bff7ea85 100644
--- a/sky/engine/core/css/parser/CSSTokenizer-in.cpp
+++ b/sky/engine/core/css/parser/CSSTokenizer-in.cpp
@@ -904,8 +904,7 @@ inline void CSSTokenizer::detectAtToken(int length, bool hasEscape)
             m_token = FONT_FACE_SYM;
         }
         CASE("keyframes") {
-            if (RuntimeEnabledFeatures::cssAnimationUnprefixedEnabled())
-                m_token = KEYFRAMES_SYM;
+            m_token = KEYFRAMES_SYM;
         }
         CASE("media") {
             m_parsingMode = MediaQueryMode;
@@ -927,9 +926,6 @@ inline void CSSTokenizer::detectAtToken(int length, bool hasEscape)
             if (LIKELY(!hasEscape && m_internal))
                 m_token = INTERNAL_VALUE_SYM;
         }
-        CASE("-webkit-keyframes") {
-            m_token = WEBKIT_KEYFRAMES_SYM;
-        }
         CASE("-internal-selector") {
             if (LIKELY(!hasEscape && m_internal))
                 m_token = INTERNAL_SELECTOR_SYM;