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

third_party/WebKit/Source/core/dom/LayoutTreeBuilder.h

Index: third_party/WebKit/Source/core/dom/LayoutTreeBuilder.h
diff --git a/third_party/WebKit/Source/core/dom/LayoutTreeBuilder.h b/third_party/WebKit/Source/core/dom/LayoutTreeBuilder.h
index 158e3618e4f73a4f52273686e6b8518849df6093..2512bd50db2e2f69e71cd32d3dde0c23152e6ff2 100644
--- a/third_party/WebKit/Source/core/dom/LayoutTreeBuilder.h
+++ b/third_party/WebKit/Source/core/dom/LayoutTreeBuilder.h
@@ -89,9 +89,12 @@ class LayoutTreeBuilderForElement : public LayoutTreeBuilder<Element> {
 
 class LayoutTreeBuilderForText : public LayoutTreeBuilder<Text> {
  public:
-  LayoutTreeBuilderForText(Text& text, LayoutObject* layoutParent)
-      : LayoutTreeBuilder(text, layoutParent) {}
+  LayoutTreeBuilderForText(Text& text,
+                           LayoutObject* layoutParent,
+                           ComputedStyle* styleFromParent)
+      : LayoutTreeBuilder(text, layoutParent), m_style(styleFromParent) {}
 
+  ComputedStyle* m_style;

[jfernandez, 2016/10/27 17:08:02]

I think we want this pointer to be reference counted. So it may be defined as 
   RefPtr<ComputedStyle> m_style;
  

   void createLayoutObject();
 };