Have Frame::animation() return a reference

Source/core/rendering/RenderLayerCompositor.cpp

 /*
  * Copyright (C) 2009, 2010 Apple 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.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 1981 matching lines @@
 
 bool RenderLayerCompositor::requiresCompositingForBackfaceVisibilityHidden(RenderObject* renderer) const
 {
     return canRender3DTransforms() && renderer->style()->backfaceVisibility() == BackfaceVisibilityHidden;
 }
 
 bool RenderLayerCompositor::requiresCompositingForAnimation(RenderObject* renderer) const
 {
     if (!(m_compositingTriggers & ChromeClient::AnimationTrigger))
         return false;
-
-    if (AnimationController* animController = renderer->animation())
-        return animController->isRunningAcceleratableAnimationOnRenderer(renderer);
-    return false;
+    return renderer->animation().isRunningAcceleratableAnimationOnRenderer(renderer);
 }
 
 bool RenderLayerCompositor::requiresCompositingForTransition(RenderObject* renderer) const
 {
     if (!(m_compositingTriggers & ChromeClient::AnimationTrigger))
         return false;
 
     if (Settings* settings = m_renderView->document().settings()) {
         if (!settings->acceleratedCompositingForTransitionEnabled())
             return false;
@@ skipping 166 matching lines @@
 
 bool RenderLayerCompositor::requiresCompositingForOverflowScrolling(const RenderLayer* layer) const
 {
     return layer->needsCompositedScrolling();
 }
 
 bool RenderLayerCompositor::isRunningAcceleratedTransformAnimation(RenderObject* renderer) const
 {
     if (!(m_compositingTriggers & ChromeClient::AnimationTrigger))
         return false;
-
-    if (AnimationController* animController = renderer->animation())
-        return animController->isRunningAnimationOnRenderer(renderer, CSSPropertyWebkitTransform);
-
-    return false;
+    return renderer->animation().isRunningAnimationOnRenderer(renderer, CSSPropertyWebkitTransform);
 }
 
 // If an element has negative z-index children, those children render in front of the
 // layer background, so we need an extra 'contents' layer for the foreground of the layer
 // object.
 bool RenderLayerCompositor::needsContentsCompositingLayer(const RenderLayer* layer) const
 {
     return layer->stackingNode()->hasNegativeZOrderList();
 }
 
@@ skipping 607 matching lines @@
     } else if (graphicsLayer == m_scrollLayer.get()) {
         name = "Frame Scrolling Layer";
     } else {
         ASSERT_NOT_REACHED();
     }
 
     return name;
 }
 
 } // namespace WebCore