Support display: contents for elements, first-line and first-letter pseudos.

third_party/WebKit/Source/core/css/resolver/StyleResolver.h

Index: third_party/WebKit/Source/core/css/resolver/StyleResolver.h
diff --git a/third_party/WebKit/Source/core/css/resolver/StyleResolver.h b/third_party/WebKit/Source/core/css/resolver/StyleResolver.h
index a06ff9ba448bfc0f27549d1bc00eceb6b1711d78..667d93ca4267b3cbaf4ad090c0db2f423de3de60 100644
--- a/third_party/WebKit/Source/core/css/resolver/StyleResolver.h
+++ b/third_party/WebKit/Source/core/css/resolver/StyleResolver.h
@@ -81,7 +81,8 @@ class CORE_EXPORT StyleResolver final
 
   PassRefPtr<ComputedStyle> styleForElement(
       Element*,
-      const ComputedStyle* parentStyle = 0,
+      const ComputedStyle* parentStyle = nullptr,
+      const ComputedStyle* layoutParentStyle = nullptr,
       StyleSharingBehavior = AllowStyleSharing,
       RuleMatchingBehavior = MatchAllRules);
 
@@ -95,7 +96,8 @@ class CORE_EXPORT StyleResolver final
   PassRefPtr<ComputedStyle> pseudoStyleForElement(
       Element*,
       const PseudoStyleRequest&,
-      const ComputedStyle* parentStyle);
+      const ComputedStyle* parentStyle,
+      const ComputedStyle* layoutParentStyle);
 
   PassRefPtr<ComputedStyle> styleForPage(int pageIndex);
   PassRefPtr<ComputedStyle> styleForText(Text*);