Make RenderObject::style() return a const object

Source/core/rendering/RenderMedia.cpp

Index: Source/core/rendering/RenderMedia.cpp
diff --git a/Source/core/rendering/RenderMedia.cpp b/Source/core/rendering/RenderMedia.cpp
index 0b93f3650e1c7bd2c4d40f4e2a9150db3beba216..84c0bb1eec5737feb60e2626137bcaf22eaab223 100644
--- a/Source/core/rendering/RenderMedia.cpp
+++ b/Source/core/rendering/RenderMedia.cpp
@@ -71,13 +71,13 @@ void RenderMedia::layout()
     LayoutState state(*this, locationOffset());
 
     controlsRenderer->setLocation(LayoutPoint(borderLeft(), borderTop()) + LayoutSize(paddingLeft(), paddingTop()));
-    controlsRenderer->style()->setHeight(Length(newSize.height(), Fixed));
-    controlsRenderer->style()->setWidth(Length(newSize.width(), Fixed));
+    controlsRenderer->deprecatedMutableStyle()->setHeight(Length(newSize.height(), Fixed));
+    controlsRenderer->deprecatedMutableStyle()->setWidth(Length(newSize.width(), Fixed));
     controlsRenderer->forceLayout();
     clearNeedsLayout();
 }
 
-bool RenderMedia::isChildAllowed(RenderObject* child, RenderStyle*) const
+bool RenderMedia::isChildAllowed(RenderObject* child, const RenderStyle*) const
 {
     // The only allowed child is the media controls. The user agent stylesheet
     // (mediaControls.css) has ::-webkit-media-controls { display: flex; }. If