SPv2: Paint SVG images and self-contained recorded pictures with their own trees.

third_party/WebKit/Source/platform/graphics/paint/EffectPaintPropertyNode.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef EffectPaintPropertyNode_h
 #define EffectPaintPropertyNode_h
 
 #include "cc/layers/layer.h"
 #include "platform/PlatformExport.h"
 #include "platform/graphics/CompositorElementId.h"
@@ skipping 10 matching lines @@
 namespace blink {
 
 // Effect nodes are abstraction of isolated groups, along with optional effects
 // that can be applied to the composited output of the group.
 //
 // The effect tree is rooted at a node with no parent. This root node should
 // not be modified.
 class PLATFORM_EXPORT EffectPaintPropertyNode
     : public RefCounted<EffectPaintPropertyNode> {
  public:
+  // This node is really a sentinel, and does not represent a real effect.
   static EffectPaintPropertyNode* root();
 
   static PassRefPtr<EffectPaintPropertyNode> create(
       PassRefPtr<const EffectPaintPropertyNode> parent,
       PassRefPtr<const TransformPaintPropertyNode> localTransformSpace,
       PassRefPtr<const ClipPaintPropertyNode> outputClip,
       CompositorFilterOperations filter,
       float opacity,
       SkBlendMode blendMode,
       CompositingReasons directCompositingReasons = CompositingReasonNone,
@@ skipping 122 matching lines @@
   CompositorElementId m_compositorElementId;
 };
 
 // Redeclared here to avoid ODR issues.
 // See platform/testing/PaintPrinters.h.
 void PrintTo(const EffectPaintPropertyNode&, std::ostream*);
 
 }  // namespace blink
 
 #endif  // EffectPaintPropertyNode_h