Add toString() for paint property node classes

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/CompositorFilterOperations.h"
 #include "platform/graphics/paint/ClipPaintPropertyNode.h"
 #include "platform/graphics/paint/TransformPaintPropertyNode.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefCounted.h"
 #include "wtf/RefPtr.h"
+#include "wtf/text/WTFString.h"
 
 #include <iosfwd>
 
 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.
@@ skipping 53 matching lines @@
   // if an effect node has changed. It ignores changes of reference filters
   // because SkImageFilter doesn't have an equality operator.
   bool operator==(const EffectPaintPropertyNode& o) const {
     return m_parent == o.m_parent &&
            m_localTransformSpace == o.m_localTransformSpace &&
            m_outputClip == o.m_outputClip && m_opacity == o.m_opacity &&
            m_filter.equalsIgnoringReferenceFilters(o.m_filter);
   }
 #endif
 
+  String toString() const;
+
  private:
   EffectPaintPropertyNode(
       PassRefPtr<const EffectPaintPropertyNode> parent,
       PassRefPtr<const TransformPaintPropertyNode> localTransformSpace,
       PassRefPtr<const ClipPaintPropertyNode> outputClip,
       CompositorFilterOperations filter,
       float opacity)
       : m_parent(parent),
         m_localTransformSpace(localTransformSpace),
         m_outputClip(outputClip),
@@ skipping 26 matching lines @@
   mutable scoped_refptr<cc::Layer> m_dummyLayer;
 };
 
 // Redeclared here to avoid ODR issues.
 // See platform/testing/PaintPrinters.h.
 void PrintTo(const EffectPaintPropertyNode&, std::ostream*);
 
 }  // namespace blink
 
 #endif  // EffectPaintPropertyNode_h