Rename ^ and ^^ combinator to /shadow-all/ and /shadow-deep/.

Source/core/css/SelectorChecker.cpp

Index: Source/core/css/SelectorChecker.cpp
diff --git a/Source/core/css/SelectorChecker.cpp b/Source/core/css/SelectorChecker.cpp
index 3fc552e4cba3aaa4d8a168bb8228fd9fc76918f3..f4010df842edc4196be917072147505933271a17 100644
--- a/Source/core/css/SelectorChecker.cpp
+++ b/Source/core/css/SelectorChecker.cpp
@@ -290,7 +290,7 @@ SelectorChecker::Match SelectorChecker::matchForRelation(const SelectorCheckingC
         return SelectorFailsAllSiblings;
 
     case CSSSelector::ShadowPseudo:
-    case CSSSelector::ChildTree:
+    case CSSSelector::ShadowAll:
         {
             // If we're in the same tree-scope as the scoping element, then following a shadow descendant combinator would escape that and thus the scope.
             if (context.scope && context.scope->treeScope() == context.element->treeScope() && (context.behaviorAtBoundary & BoundaryBehaviorMask) != StaysWithinTreeScope)
@@ -305,7 +305,7 @@ SelectorChecker::Match SelectorChecker::matchForRelation(const SelectorCheckingC
             return this->match(nextContext, siblingTraversalStrategy, result);
         }
 
-    case CSSSelector::DescendantTree:
+    case CSSSelector::ShadowDeep:
         {
             nextContext.isSubSelector = false;
             nextContext.elementStyle = 0;