Start USING_FAST_MALLOC for more paint data structures

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

 // Copyright 2016 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 PropertyTreeState_h
 #define PropertyTreeState_h
 
 #include "platform/graphics/paint/ClipPaintPropertyNode.h"
 #include "platform/graphics/paint/EffectPaintPropertyNode.h"
 #include "platform/graphics/paint/TransformPaintPropertyNode.h"
 #include "wtf/HashFunctions.h"
 #include "wtf/HashTraits.h"
 #include "wtf/text/StringBuilder.h"
 
 namespace blink {
 
 // A complete set of paint properties including those that are inherited from
 // other objects.  RefPtrs are used to guard against use-after-free bugs and
 // DCHECKs ensure PropertyTreeState never retains the last reference to a
 // property tree node.
 class PLATFORM_EXPORT PropertyTreeState {

[chrishtr, 2017/03/29 16:08:58]

*PaintPropertyNode also?

[pdr., 2017/03/29 16:16:26]

I think we're good here because PaintPropertyNodes should be in the partition
alloc due to being RefCounted.

+  USING_FAST_MALLOC(PropertyTreeState);
+
  public:
   PropertyTreeState(const TransformPaintPropertyNode* transform,
                     const ClipPaintPropertyNode* clip,
                     const EffectPaintPropertyNode* effect)
       : m_transform(transform), m_clip(clip), m_effect(effect) {
     DCHECK(!m_transform || !m_transform->hasOneRef());
     DCHECK(!m_clip || !m_clip->hasOneRef());
     DCHECK(!m_effect || !m_effect->hasOneRef());
   }
 
@@ skipping 144 matching lines @@
   }
 
   HashMap<const PropertyTreeNode*, String> m_nodeToDebugString;
 };
 
 #endif
 
 }  // namespace blink
 
 #endif  // PropertyTreeState_h