[css-display] Support display: contents pseudo-elements.

third_party/WebKit/Source/core/layout/LayoutTextFragment.h

Index: third_party/WebKit/Source/core/layout/LayoutTextFragment.h
diff --git a/third_party/WebKit/Source/core/layout/LayoutTextFragment.h b/third_party/WebKit/Source/core/layout/LayoutTextFragment.h
index fb68a53d2861596e71710f397ddbd3212a86127a..800fb669d7c73086cb38a112eaba8d977e3b2076 100644
--- a/third_party/WebKit/Source/core/layout/LayoutTextFragment.h
+++ b/third_party/WebKit/Source/core/layout/LayoutTextFragment.h
@@ -43,6 +43,12 @@ class LayoutTextFragment final : public LayoutText {
   LayoutTextFragment(Node*, StringImpl*);
   ~LayoutTextFragment() override;
 
+  static LayoutTextFragment* createAnonymous(PseudoElement&,
+                                             StringImpl*,
+                                             unsigned startOffset,
+                                             unsigned length);
+  static LayoutTextFragment* createAnonymous(PseudoElement&, StringImpl*);
+
   bool isTextFragment() const override { return true; }
 
   bool canBeSelectionLeaf() const override {