Convert first letter into a pseudo element.

Source/core/dom/PseudoElement.h

Index: Source/core/dom/PseudoElement.h
diff --git a/Source/core/dom/PseudoElement.h b/Source/core/dom/PseudoElement.h
index 25761531be3d1da66b308d000187aaa62bfb1690..465df02687f6f84de12e9a0ee68ac0646a933fc6 100644
--- a/Source/core/dom/PseudoElement.h
+++ b/Source/core/dom/PseudoElement.h
@@ -32,6 +32,8 @@
 
 namespace blink {
 
+class RenderTextFragment;
+
 class PseudoElement FINAL : public Element {
 public:
     static PassRefPtrWillBeRawPtr<PseudoElement> create(Element* parent, PseudoId pseudoId)
@@ -46,24 +48,32 @@ public:
     virtual bool canStartSelection() const OVERRIDE { return false; }
     virtual bool canContainRangeEndPoint() const OVERRIDE { return false; }
     virtual PseudoId pseudoId() const OVERRIDE { return m_pseudoId; }
+    virtual RenderObject* firstLetterTextRenderer() const OVERRIDE;
 
     static String pseudoElementNameForEvents(PseudoId);
 
     void dispose();
 
+    void setRemainingTextRenderer(RenderTextFragment* fragment) { m_remainingTextRenderer = fragment; }
+    RenderTextFragment* remainingTextRenderer() const { return m_remainingTextRenderer; }
+
 private:
     PseudoElement(Element*, PseudoId);
+    void attachFirstLetterTextRenderers();
+    RenderStyle* styleForFirstLetter(RenderObject*);
 
     virtual void didRecalcStyle(StyleRecalcChange) OVERRIDE;
 
     PseudoId m_pseudoId;
+    RenderTextFragment* m_remainingTextRenderer;
 };
 
 const QualifiedName& pseudoElementTagName();
 
 inline bool pseudoElementRendererIsNeeded(const RenderStyle* style)
 {
-    return style && style->display() != NONE && (style->styleType() == BACKDROP || style->contentData());
+    return style && style->display() != NONE

[esprehn, 2014/09/30 09:00:30]

This statement has gotten confusing, can we break it into multiple if statements
and returns instead?

if (!style)
  return false;
if (style->display() == NONE)
  return false;
if (...)
  ...
return true;

[dsinclair, 2014/09/30 21:46:34]

Done.

+        && (style->styleType() == FIRST_LETTER || (style->styleType() == BACKDROP || style->contentData()));
 }
 
 DEFINE_ELEMENT_TYPE_CASTS(PseudoElement, isPseudoElement());