1 files changed, 20 insertions, 9 deletions

diff --git a/chromium/third_party/blink/renderer/core/css/css_selector.cc b/chromium/third_party/blink/renderer/core/css/css_selector.cc
index df7bb9aa9fe..fdda0d6e98b 100644
--- a/chromium/third_party/blink/renderer/core/css/css_selector.cc
+++ b/chromium/third_party/blink/renderer/core/css/css_selector.cc
@@ -297,7 +297,7 @@ PseudoId CSSSelector::GetPseudoId(PseudoType type) {
     case kPseudoSlotted:
     case kPseudoVideoPersistent:
     case kPseudoVideoPersistentAncestor:
-    case kPseudoXrImmersiveDomOverlay:
+    case kPseudoXrOverlay:
       return kPseudoIdNone;
   }
 
@@ -331,8 +331,6 @@ const static NameToPseudoStruct kPseudoTypeWithoutArgumentsMap[] = {
     {"-internal-video-persistent", CSSSelector::kPseudoVideoPersistent},
     {"-internal-video-persistent-ancestor",
      CSSSelector::kPseudoVideoPersistentAncestor},
-    {"-internal-xr-immersive-dom-overlay",
-     CSSSelector::kPseudoXrImmersiveDomOverlay},
     {"-webkit-any-link", CSSSelector::kPseudoWebkitAnyLink},
     {"-webkit-autofill", CSSSelector::kPseudoAutofill},
     {"-webkit-drag", CSSSelector::kPseudoDrag},
@@ -410,6 +408,7 @@ const static NameToPseudoStruct kPseudoTypeWithoutArgumentsMap[] = {
     {"vertical", CSSSelector::kPseudoVertical},
     {"visited", CSSSelector::kPseudoVisited},
     {"window-inactive", CSSSelector::kPseudoWindowInactive},
+    {"xr-overlay", CSSSelector::kPseudoXrOverlay},
 };
 
 const static NameToPseudoStruct kPseudoTypeWithArgumentsMap[] = {
@@ -597,7 +596,6 @@ void CSSSelector::UpdatePseudoType(const AtomicString& value,
     case kPseudoSpatialNavigationInterest:
     case kPseudoVideoPersistent:
     case kPseudoVideoPersistentAncestor:
-    case kPseudoXrImmersiveDomOverlay:
       if (mode != kUASheetMode) {
         pseudo_type_ = kPseudoUnknown;
         break;
@@ -673,6 +671,7 @@ void CSSSelector::UpdatePseudoType(const AtomicString& value,
     case kPseudoVisited:
     case kPseudoWebkitAnyLink:
     case kPseudoWindowInactive:
+    case kPseudoXrOverlay:
       if (match_ != kPseudoClass)
         pseudo_type_ = kPseudoUnknown;
       break;
@@ -787,7 +786,7 @@ const CSSSelector* CSSSelector::SerializeCompound(
         case kPseudoLang:
         case kPseudoState:
           builder.Append('(');
-          builder.Append(simple_selector->Argument());
+          SerializeIdentifier(simple_selector->Argument(), builder);
           builder.Append(')');
           break;
         case kPseudoNot:
@@ -804,13 +803,19 @@ const CSSSelector* CSSSelector::SerializeCompound(
       }
     } else if (simple_selector->match_ == kPseudoElement) {
       builder.Append("::");
-      builder.Append(simple_selector->SerializingValue());
+      SerializeIdentifier(simple_selector->SerializingValue(), builder);
       switch (simple_selector->GetPseudoType()) {
-        case kPseudoPart:
-          builder.Append('(');
-          builder.Append(simple_selector->Argument());
+        case kPseudoPart: {
+          char separator = '(';
+          for (AtomicString part : *simple_selector->PartNames()) {
+            builder.Append(separator);
+            if (separator == '(')
+              separator = ' ';
+            SerializeIdentifier(part, builder);
+          }
           builder.Append(')');
           break;
+        }
         default:
           break;
       }
@@ -1211,4 +1216,10 @@ bool CSSSelector::RareData::MatchNth(unsigned unsigned_count) {
   return (NthBValue() - count) % (-NthAValue()) == 0;
 }
 
+void CSSSelector::SetPartNames(
+    std::unique_ptr<Vector<AtomicString>> part_names) {
+  CreateRareData();
+  data_.rare_data_->part_names_ = std::move(part_names);
+}
+
 }  // namespace blink