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

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

Index: third_party/WebKit/Source/core/css/CSSSelector.cpp
diff --git a/third_party/WebKit/Source/core/css/CSSSelector.cpp b/third_party/WebKit/Source/core/css/CSSSelector.cpp
index 08775fd5dd5ee38179f64a4efd412d3848b712d2..9d6fd162cf74363d5de7bced5a4821e39793a73a 100644
--- a/third_party/WebKit/Source/core/css/CSSSelector.cpp
+++ b/third_party/WebKit/Source/core/css/CSSSelector.cpp
@@ -31,6 +31,7 @@
 #include "core/HTMLNames.h"
 #include "core/css/CSSMarkup.h"
 #include "core/css/CSSSelectorList.h"
+#include "core/css/parser/CSSParserContext.h"
 #include "platform/RuntimeEnabledFeatures.h"
 #include "platform/wtf/Assertions.h"
 #include "platform/wtf/HashMap.h"
@@ -489,6 +490,7 @@ PseudoId CSSSelector::ParsePseudoId(const String& name) {
 }
 
 void CSSSelector::UpdatePseudoType(const AtomicString& value,
+                                   const CSSParserContext& context,
                                    bool has_arguments) {
   DCHECK(match_ == kPseudoClass || match_ == kPseudoElement ||
          match_ == kPagePseudoClass);
@@ -521,11 +523,14 @@ void CSSSelector::UpdatePseudoType(const AtomicString& value,
     case kPseudoWebKitCustomElement:
     case kPseudoBlinkInternalElement:
     case kPseudoContent:
-    case kPseudoShadow:
     case kPseudoSlotted:
       if (match_ != kPseudoElement)
         pseudo_type_ = kPseudoUnknown;
       break;
+    case kPseudoShadow:
+      if (match_ != kPseudoElement || context.IsDynamicProfile())
+        pseudo_type_ = kPseudoUnknown;
+      break;
     case kPseudoFirstPage:
     case kPseudoLeftPage:
     case kPseudoRightPage:
@@ -769,6 +774,7 @@ String CSSSelector::SelectorText(const String& right_side) const {
       case kChild:
         return tag_history->SelectorText(" > " + str.ToString() + right_side);
       case kShadowDeep:
+      case kShadowDeepAsDescendant:
         return tag_history->SelectorText(" /deep/ " + str.ToString() +
                                          right_side);
       case kShadowPiercingDescendant: