Turn styleWillChange |newStyle| into a reference

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 146ebda32f4b331805c778db26779e4473071532..d15324e4d118868a9d25f3a8fe30e9e3d6e5af5d 100644
--- a/Source/core/rendering/RenderBlock.cpp
+++ b/Source/core/rendering/RenderBlock.cpp
@@ -276,14 +276,14 @@ void RenderBlock::willBeDestroyed()
     RenderBox::willBeDestroyed();
 }
 
-void RenderBlock::styleWillChange(StyleDifference diff, const RenderStyle* newStyle)
+void RenderBlock::styleWillChange(StyleDifference diff, const RenderStyle& newStyle)
 {
     RenderStyle* oldStyle = style();
 
-    setReplaced(newStyle->isDisplayInlineType());
+    setReplaced(newStyle.isDisplayInlineType());
 
-    if (oldStyle && parent() && diff == StyleDifferenceLayout && oldStyle->position() != newStyle->position()) {
-        if (newStyle->position() == StaticPosition)
+    if (oldStyle && parent() && diff == StyleDifferenceLayout && oldStyle->position() != newStyle.position()) {
+        if (newStyle.position() == StaticPosition)
             // Clear our positioned objects list. Our absolutely positioned descendants will be
             // inserted into our containing block's positioned objects list during layout.
             removePositionedObjects(0, NewContainingBlock);