Have Node::diff() take a Document reference in argument

Source/core/rendering/RenderBlock.cpp

Index: Source/core/rendering/RenderBlock.cpp
diff --git a/Source/core/rendering/RenderBlock.cpp b/Source/core/rendering/RenderBlock.cpp
index 3f6f504244c271b1a0637d2eb95cce0fe7062e33..4caba65fdbfb4119e4c2f48f6f63ab70e59d0c53 100644
--- a/Source/core/rendering/RenderBlock.cpp
+++ b/Source/core/rendering/RenderBlock.cpp
@@ -6582,7 +6582,7 @@ void RenderBlock::updateFirstLetterStyle(RenderObject* firstLetterBlock, RenderO
     RenderStyle* pseudoStyle = styleForFirstLetter(firstLetterBlock, firstLetterContainer);
     ASSERT(firstLetter->isFloating() || firstLetter->isInline());
 
-    if (Node::diff(firstLetter->style(), pseudoStyle, &document()) == Node::Reattach) {
+    if (Node::diff(firstLetter->style(), pseudoStyle, document()) == Node::Reattach) {
         // The first-letter renderer needs to be replaced. Create a new renderer of the right type.
         RenderObject* newFirstLetter;
         if (pseudoStyle->display() == INLINE)