Make RenderObject::style() return a const object

Source/core/html/shadow/MediaControlElements.cpp

 /*
  * Copyright (C) 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 599 matching lines @@
 }
 
 PassRefPtrWillBeRawPtr<MediaControlTextTrackContainerElement> MediaControlTextTrackContainerElement::create(MediaControls& mediaControls)
 {
     RefPtrWillBeRawPtr<MediaControlTextTrackContainerElement> element = adoptRefWillBeNoop(new MediaControlTextTrackContainerElement(mediaControls));
     element->setShadowPseudoId(AtomicString("-webkit-media-text-track-container", AtomicString::ConstructFromLiteral));
     element->hide();
     return element.release();
 }
 
-RenderObject* MediaControlTextTrackContainerElement::createRenderer(RenderStyle*)
+RenderObject* MediaControlTextTrackContainerElement::createRenderer(const RenderStyle*)
 {
     return new RenderTextTrackContainerElement(this);
 }
 
 void MediaControlTextTrackContainerElement::updateDisplay()
 {
     if (!mediaElement().closedCaptionsVisible()) {
         removeChildren();
         return;
     }
@@ skipping 78 matching lines @@
     float fontSize = smallestDimension * 0.05f;
     if (fontSize != m_fontSize) {
         m_fontSize = fontSize;
         setInlineStyleProperty(CSSPropertyFontSize, fontSize, CSSPrimitiveValue::CSS_PX);
     }
 }
 
 // ----------------------------
 
 } // namespace blink