Revert of 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 9d6fd162cf74363d5de7bced5a4821e39793a73a..08775fd5dd5ee38179f64a4efd412d3848b712d2 100644
--- a/third_party/WebKit/Source/core/css/CSSSelector.cpp
+++ b/third_party/WebKit/Source/core/css/CSSSelector.cpp
@@ -31,7 +31,6 @@
 #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"
@@ -490,7 +489,6 @@
 }
 
 void CSSSelector::UpdatePseudoType(const AtomicString& value,
-                                   const CSSParserContext& context,
                                    bool has_arguments) {
   DCHECK(match_ == kPseudoClass || match_ == kPseudoElement ||
          match_ == kPagePseudoClass);
@@ -523,12 +521,9 @@
     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:
@@ -774,7 +769,6 @@
       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: