CC Animation: Use ElementId to attach CC animation players.

third_party/WebKit/Source/core/animation/CompositorAnimations.cpp

 /*
  * Copyright (C) 2013 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 373 matching lines @@
 
     if (!canStartAnimationOnCompositor(element)) {
         ASSERT_NOT_REACHED();
         return;
     }
     CompositorAnimationPlayer* compositorPlayer = animation.compositorPlayer();
     ASSERT(compositorPlayer);
     compositorPlayer->pauseAnimation(id, pauseTime);
 }
 
-bool CompositorAnimations::canAttachCompositedLayers(const Element& element, const Animation& animation)
-{
-    if (!animation.compositorPlayer())
-        return false;
-
-    if (!element.layoutObject() || !element.layoutObject()->isBoxModelObject())
-        return false;
-
-    PaintLayer* layer = toLayoutBoxModelObject(element.layoutObject())->layer();
-
-    if (!layer || !layer->isAllowedToQueryCompositingState()
-        || !layer->compositedLayerMapping()
-        || !layer->compositedLayerMapping()->mainGraphicsLayer())
-        return false;
-
-    if (!layer->compositedLayerMapping()->mainGraphicsLayer()->platformLayer())
-        return false;
-
-    return true;
-}
-
-void CompositorAnimations::attachCompositedLayers(const Element& element, const Animation& animation)
-{
-    ASSERT(element.layoutObject());
-
-    PaintLayer* layer = toLayoutBoxModelObject(element.layoutObject())->layer();
-    ASSERT(layer);
-
-    CompositorAnimationPlayer* compositorPlayer = animation.compositorPlayer();
-    ASSERT(compositorPlayer);
-
-    ASSERT(layer->compositedLayerMapping());
-    compositorPlayer->attachLayer(layer->compositedLayerMapping()->mainGraphicsLayer()->platformLayer());
-}
-

[loyso (OOO), 2016/05/03 07:26:40]

This is the cool deletion. We will bypass all those trees of layers.

 // -----------------------------------------------------------------------
 // CompositorAnimationsImpl
 // -----------------------------------------------------------------------
 
 bool CompositorAnimationsImpl::convertTimingForCompositor(const Timing& timing, double timeOffset, CompositorTiming& out, double animationPlaybackRate)
 {
     timing.assertValid();
 
     // FIXME: Compositor does not know anything about endDelay.
     if (timing.endDelay != 0)
@@ skipping 304 matching lines @@
             break;
         default:
             ASSERT_NOT_REACHED();
         }
         animations.append(animation.release());
     }
     ASSERT(!animations.isEmpty());
 }
 
 } // namespace blink