Avoid subtree style recalc for :-webkit-full-page-media.

Source/core/css/RuleFeature.cpp

Index: Source/core/css/RuleFeature.cpp
diff --git a/Source/core/css/RuleFeature.cpp b/Source/core/css/RuleFeature.cpp
index e2b51f8b253f75a8a0da83df356e0f0b0633cfa4..28ec6d82de9d82ee3d3984fb8cdb193a54e15189 100644
--- a/Source/core/css/RuleFeature.cpp
+++ b/Source/core/css/RuleFeature.cpp
@@ -95,6 +95,7 @@ static bool supportsInvalidation(CSSSelector::PseudoType type)
     case CSSSelector::PseudoActive:
     case CSSSelector::PseudoChecked:
     case CSSSelector::PseudoEnabled:
+    case CSSSelector::PseudoFullPageMedia:
     case CSSSelector::PseudoDefault:
     case CSSSelector::PseudoDisabled:
     case CSSSelector::PseudoOptional:
@@ -160,7 +161,6 @@ static bool requiresSubtreeInvalidation(const CSSSelector& selector)
     switch (selector.pseudoType()) {
     case CSSSelector::PseudoFirstLine:
     case CSSSelector::PseudoFirstLetter:
-    case CSSSelector::PseudoFullPageMedia:
     case CSSSelector::PseudoCornerPresent:
     case CSSSelector::PseudoDecrement:
     case CSSSelector::PseudoIncrement: