Add StyleChangeState to get rid of a bunch of static state in the render tree.

Source/WebCore/rendering/RenderText.cpp

Index: Source/WebCore/rendering/RenderText.cpp
diff --git a/Source/WebCore/rendering/RenderText.cpp b/Source/WebCore/rendering/RenderText.cpp
index 1a31fe52ed2419b0a4073d07ba010864f989e704..f260469e729238a942cf1488f2af705981061220 100644
--- a/Source/WebCore/rendering/RenderText.cpp
+++ b/Source/WebCore/rendering/RenderText.cpp
@@ -194,7 +194,7 @@ void RenderText::updateNeedsTranscoding()
     m_needsTranscoding = fontTranscoder().needsTranscoding(style()->font().fontDescription(), encoding);
 }
 
-void RenderText::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle)
+void RenderText::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle, const StyleChangeState&)
 {
     // There is no need to ever schedule repaints from a style change of a text run, since
     // we already did this for the parent of the text run.