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

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

Index: third_party/WebKit/Source/core/layout/LayoutTextFragment.cpp
diff --git a/third_party/WebKit/Source/core/layout/LayoutTextFragment.cpp b/third_party/WebKit/Source/core/layout/LayoutTextFragment.cpp
index 72d1e4fd430d6e00a1399086abdd06f47fbbcd6a..261e6a26cc839cc3f14de5a044559b95e980f441 100644
--- a/third_party/WebKit/Source/core/layout/LayoutTextFragment.cpp
+++ b/third_party/WebKit/Source/core/layout/LayoutTextFragment.cpp
@@ -26,6 +26,7 @@
 #include "core/dom/PseudoElement.h"
 #include "core/dom/StyleChangeReason.h"
 #include "core/dom/Text.h"
+#include "core/frame/FrameView.h"
 #include "core/layout/HitTestResult.h"
 
 namespace blink {
@@ -55,6 +56,22 @@ LayoutTextFragment::~LayoutTextFragment() {
   ASSERT(!m_firstLetterPseudoElement);
 }
 
+LayoutTextFragment* LayoutTextFragment::createAnonymous(PseudoElement& pseudo,
+                                                        StringImpl* str,
+                                                        unsigned start,
+                                                        unsigned length) {
+  LayoutTextFragment* text =
+      new LayoutTextFragment(nullptr, str, start, length);
+  text->setPseudoForAnonymous(pseudo);
+  pseudo.document().view()->incrementVisuallyNonEmptyCharacterCount(length);
+  return text;
+}
+
+LayoutTextFragment* LayoutTextFragment::createAnonymous(PseudoElement& pseudo,
+                                                        StringImpl* str) {
+  return createAnonymous(pseudo, str, 0, str ? str->length() : 0);
+}
+
 void LayoutTextFragment::willBeDestroyed() {
   if (m_isRemainingTextLayoutObject && m_firstLetterPseudoElement)
     m_firstLetterPseudoElement->setRemainingTextLayoutObject(nullptr);