Add CSS property priority for CSS animation affecting properties

third_party/WebKit/Source/core/css/resolver/CSSPropertyPriority.h

Index: third_party/WebKit/Source/core/css/resolver/CSSPropertyPriority.h
diff --git a/third_party/WebKit/Source/core/css/resolver/CSSPropertyPriority.h b/third_party/WebKit/Source/core/css/resolver/CSSPropertyPriority.h
index ea0a60041e2265506fce2b703cb2a185de3f7c0e..7637f3723af4b3e677bea9509ff24ee5c688d4ee 100644
--- a/third_party/WebKit/Source/core/css/resolver/CSSPropertyPriority.h
+++ b/third_party/WebKit/Source/core/css/resolver/CSSPropertyPriority.h
@@ -16,6 +16,7 @@ namespace blink {
 
 enum CSSPropertyPriority {
   ResolveVariables,
+  AnimationPropertyPriority,
   HighPropertyPriority,
   LowPropertyPriority
 };
@@ -46,8 +47,31 @@ inline CSSPropertyID CSSPropertyPriorityData<ResolveVariables>::last() {
 }
 
 template <>
+inline CSSPropertyID
+CSSPropertyPriorityData<AnimationPropertyPriority>::first() {
+  static_assert(CSSPropertyAnimationDelay == firstCSSProperty,
+                "CSSPropertyAnimationDelay should be the first animation "
+                "priority property");
+  return CSSPropertyAnimationDelay;
+}
+
+template <>
+inline CSSPropertyID
+CSSPropertyPriorityData<AnimationPropertyPriority>::last() {
+  static_assert(
+      CSSPropertyTransitionTimingFunction == CSSPropertyAnimationDelay + 11,
+      "CSSPropertyTransitionTimingFunction should be the end of the high "
+      "priority property range");
+  static_assert(
+      CSSPropertyTransitionProperty == CSSPropertyTransitionTimingFunction - 1,

[Timothy Loh, 2016/10/21 05:42:55]

This assert seems pretty random and not useful, I wouldn't add it :/

[alancutter (OOO until 2018), 2016/10/24 04:08:27]

Agreed, it was copying the logic of the assertion below. Changed it to be a + 1
test instead of - 1.

+      "CSSPropertyTransitionProperty should be immediately before "
+      "CSSPropertyTransitionTimingFunction");
+  return CSSPropertyTransitionTimingFunction;
+}
+
+template <>
 inline CSSPropertyID CSSPropertyPriorityData<HighPropertyPriority>::first() {
-  static_assert(CSSPropertyColor == firstCSSProperty,
+  static_assert(CSSPropertyColor == CSSPropertyTransitionTimingFunction + 1,
                 "CSSPropertyColor should be the first high priority property");
   return CSSPropertyColor;
 }