Make /deep/ as no-op and remove ::shadow in dynamic profile

third_party/WebKit/Source/core/css/SelectorChecker.cpp

Index: third_party/WebKit/Source/core/css/SelectorChecker.cpp
diff --git a/third_party/WebKit/Source/core/css/SelectorChecker.cpp b/third_party/WebKit/Source/core/css/SelectorChecker.cpp
index 049b269a99f5e363fadc20a39271793451ab11b5..20339e4018bc48d492006de8472ec94203540379 100644
--- a/third_party/WebKit/Source/core/css/SelectorChecker.cpp
+++ b/third_party/WebKit/Source/core/css/SelectorChecker.cpp
@@ -337,6 +337,10 @@ SelectorChecker::MatchStatus SelectorChecker::MatchForRelation(
   next_context.pseudo_id = kPseudoIdNone;
 
   switch (relation) {
+    case CSSSelector::kShadowDeepAsDescendant:
+      Deprecation::CountDeprecation(context.element->GetDocument(),
+                                    UseCounter::kCSSDeepCombinator);
+    // fall through
     case CSSSelector::kDescendant:
       if (context.selector->RelationIsAffectedByPseudoContent()) {
         for (Element* element = context.element; element;
@@ -414,10 +418,6 @@ SelectorChecker::MatchStatus SelectorChecker::MatchForRelation(
       return kSelectorFailsAllSiblings;
 
     case CSSSelector::kShadowPseudo: {
-      if (!is_ua_rule_ && mode_ != kQueryingRules &&
-          context.selector->GetPseudoType() == CSSSelector::kPseudoShadow)
-        Deprecation::CountDeprecation(context.element->GetDocument(),
-                                      UseCounter::kCSSSelectorPseudoShadow);
       // 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->OwnerShadowHost() &&