Convert first letter into a pseudo element.

Source/core/dom/PseudoElement.cpp

 /*
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 #include "config.h"
 #include "core/dom/PseudoElement.h"
 
+#include "core/dom/FirstLetterPseudoElement.h"
 #include "core/inspector/InspectorInstrumentation.h"
 #include "core/rendering/RenderObject.h"
 #include "core/rendering/RenderQuote.h"
 #include "core/rendering/style/ContentData.h"
 
 namespace blink {
 
+PassRefPtrWillBeRawPtr<PseudoElement> PseudoElement::create(Element* parent, PseudoId pseudoId)
+{
+    if (pseudoId == FIRST_LETTER)
+        return adoptRefWillBeNoop(new FirstLetterPseudoElement(parent));
+    return adoptRefWillBeNoop(new PseudoElement(parent, pseudoId));
+}
+
 const QualifiedName& pseudoElementTagName(PseudoId pseudoId)
 {
     switch (pseudoId) {
     case AFTER: {
         DEFINE_STATIC_LOCAL(QualifiedName, after, (nullAtom, "<pseudo:after>", nullAtom));
         return after;
     }
     case BEFORE: {
         DEFINE_STATIC_LOCAL(QualifiedName, before, (nullAtom, "<pseudo:before>", nullAtom));
         return before;
     }
     case BACKDROP: {
         DEFINE_STATIC_LOCAL(QualifiedName, backdrop, (nullAtom, "<pseudo:backdrop>", nullAtom));
         return backdrop;
     }
+    case FIRST_LETTER: {
+        DEFINE_STATIC_LOCAL(QualifiedName, firstLetter, (nullAtom, "<pseudo:first-letter>", nullAtom));
+        return firstLetter;
+    }
     default: {
         ASSERT_NOT_REACHED();
     }
     }
     DEFINE_STATIC_LOCAL(QualifiedName, name, (nullAtom, "<pseudo>", nullAtom));
     return name;
 }
 
 String PseudoElement::pseudoElementNameForEvents(PseudoId pseudoId)
 {
@@ skipping 40 matching lines @@
 
 void PseudoElement::attach(const AttachContext& context)
 {
     ASSERT(!renderer());
 
     Element::attach(context);
 
     RenderObject* renderer = this->renderer();
     if (!renderer)
         return;
+
     RenderStyle* style = renderer->style();
     if (style->styleType() != BEFORE && style->styleType() != AFTER)
         return;
     ASSERT(style->contentData());
 
     for (const ContentData* content = style->contentData(); content; content = content->next()) {
         RenderObject* child = content->createRenderer(document(), style);
         if (renderer->isChildAllowed(child, style)) {
             renderer->addChild(child);
             if (child->isQuote())
@@ skipping 14 matching lines @@
         return;
 
     // The renderers inside pseudo elements are anonymous so they don't get notified of recalcStyle and must have
     // the style propagated downward manually similar to RenderObject::propagateStyleToAnonymousChildren.
     RenderObject* renderer = this->renderer();
     for (RenderObject* child = renderer->nextInPreOrder(renderer); child; child = child->nextInPreOrder(renderer)) {
         // We only manage the style for the generated content items.
         if (!child->isText() && !child->isQuote() && !child->isImage())
             continue;
 
-        // The style for the RenderTextFragment for first letter is managed by an enclosing block, not by us.
-        if (child->style()->styleType() == FIRST_LETTER)
-            continue;
-
         child->setPseudoStyle(renderer->style());
     }
 }
 
 } // namespace