Oilpan: move SVG property hierarchy to the heap.

Source/platform/graphics/filters/FilterOperation.h

Index: Source/platform/graphics/filters/FilterOperation.h
diff --git a/Source/platform/graphics/filters/FilterOperation.h b/Source/platform/graphics/filters/FilterOperation.h
index 93bb10b6e46e4f45b7069165e0f45183eb7f85bc..b6270f3fe9d52240cbc60752a998725bc3c4d62d 100644
--- a/Source/platform/graphics/filters/FilterOperation.h
+++ b/Source/platform/graphics/filters/FilterOperation.h
@@ -31,6 +31,7 @@
 #include "platform/graphics/Color.h"
 #include "platform/graphics/filters/Filter.h"
 #include "platform/graphics/filters/ReferenceFilter.h"
+#include "platform/heap/Handle.h"
 #include "wtf/OwnPtr.h"
 #include "wtf/PassOwnPtr.h"
 #include "wtf/RefCounted.h"
@@ -40,7 +41,7 @@ namespace blink {
 
 // CSS Filters
 
-class PLATFORM_EXPORT FilterOperation : public RefCounted<FilterOperation> {
+class PLATFORM_EXPORT FilterOperation : public RefCountedWillBeGarbageCollectedFinalized<FilterOperation> {
 public:
     enum OperationType {
         REFERENCE, // url(#somefilter)
@@ -81,8 +82,9 @@ public:
     }
 
     virtual ~FilterOperation() { }
+    virtual void trace(Visitor*) { }
 
-    static PassRefPtr<FilterOperation> blend(const FilterOperation* from, const FilterOperation* to, double progress);
+    static PassRefPtrWillBeRawPtr<FilterOperation> blend(const FilterOperation* from, const FilterOperation* to, double progress);
     virtual bool operator==(const FilterOperation&) const = 0;
     bool operator!=(const FilterOperation& o) const { return !(*this == o); }
 
@@ -103,7 +105,7 @@ protected:
     OperationType m_type;
 
 private:
-    virtual PassRefPtr<FilterOperation> blend(const FilterOperation* from, double progress) const = 0;
+    virtual PassRefPtrWillBeRawPtr<FilterOperation> blend(const FilterOperation* from, double progress) const = 0;
 };
 
 #define DEFINE_FILTER_OPERATION_TYPE_CASTS(thisType, operationType) \
@@ -111,9 +113,9 @@ private:
 
 class PLATFORM_EXPORT ReferenceFilterOperation : public FilterOperation {
 public:
-    static PassRefPtr<ReferenceFilterOperation> create(const String& url, const AtomicString& fragment)
+    static PassRefPtrWillBeRawPtr<ReferenceFilterOperation> create(const String& url, const AtomicString& fragment)
     {
-        return adoptRef(new ReferenceFilterOperation(url, fragment));
+        return adoptRefWillBeNoop(new ReferenceFilterOperation(url, fragment));
     }
 
     virtual bool affectsOpacity() const override { return true; }
@@ -123,10 +125,12 @@ public:
     const AtomicString& fragment() const { return m_fragment; }
 
     ReferenceFilter* filter() const { return m_filter.get(); }
-    void setFilter(PassRefPtr<ReferenceFilter> filter) { m_filter = filter; }
+    void setFilter(PassRefPtrWillBeRawPtr<ReferenceFilter> filter) { m_filter = filter; }
+
+    virtual void trace(Visitor*) override;
 
 private:
-    virtual PassRefPtr<FilterOperation> blend(const FilterOperation* from, double progress) const override
+    virtual PassRefPtrWillBeRawPtr<FilterOperation> blend(const FilterOperation* from, double progress) const override
     {
         ASSERT_NOT_REACHED();
         return nullptr;
@@ -149,7 +153,7 @@ private:
 
     String m_url;
     AtomicString m_fragment;
-    RefPtr<ReferenceFilter> m_filter;
+    RefPtrWillBeMember<ReferenceFilter> m_filter;
 };
 
 DEFINE_FILTER_OPERATION_TYPE_CASTS(ReferenceFilterOperation, REFERENCE);
@@ -158,16 +162,16 @@ DEFINE_FILTER_OPERATION_TYPE_CASTS(ReferenceFilterOperation, REFERENCE);
 // For HUE_ROTATE, the angle of rotation is stored in m_amount.
 class PLATFORM_EXPORT BasicColorMatrixFilterOperation : public FilterOperation {
 public:
-    static PassRefPtr<BasicColorMatrixFilterOperation> create(double amount, OperationType type)
+    static PassRefPtrWillBeRawPtr<BasicColorMatrixFilterOperation> create(double amount, OperationType type)
     {
-        return adoptRef(new BasicColorMatrixFilterOperation(amount, type));
+        return adoptRefWillBeNoop(new BasicColorMatrixFilterOperation(amount, type));
     }
 
     double amount() const { return m_amount; }
 
 
 private:
-    virtual PassRefPtr<FilterOperation> blend(const FilterOperation* from, double progress) const override;
+    virtual PassRefPtrWillBeRawPtr<FilterOperation> blend(const FilterOperation* from, double progress) const override;
     virtual bool operator==(const FilterOperation& o) const override
     {
         if (!isSameType(o))
@@ -196,9 +200,9 @@ DEFINE_TYPE_CASTS(BasicColorMatrixFilterOperation, FilterOperation, op, isBasicC
 // INVERT, BRIGHTNESS, CONTRAST and OPACITY are variations on a basic component transfer effect.
 class PLATFORM_EXPORT BasicComponentTransferFilterOperation : public FilterOperation {
 public:
-    static PassRefPtr<BasicComponentTransferFilterOperation> create(double amount, OperationType type)
+    static PassRefPtrWillBeRawPtr<BasicComponentTransferFilterOperation> create(double amount, OperationType type)
     {
-        return adoptRef(new BasicComponentTransferFilterOperation(amount, type));
+        return adoptRefWillBeNoop(new BasicComponentTransferFilterOperation(amount, type));
     }
 
     double amount() const { return m_amount; }
@@ -207,7 +211,7 @@ public:
 
 
 private:
-    virtual PassRefPtr<FilterOperation> blend(const FilterOperation* from, double progress) const override;
+    virtual PassRefPtrWillBeRawPtr<FilterOperation> blend(const FilterOperation* from, double progress) const override;
     virtual bool operator==(const FilterOperation& o) const override
     {
         if (!isSameType(o))
@@ -235,9 +239,9 @@ DEFINE_TYPE_CASTS(BasicComponentTransferFilterOperation, FilterOperation, op, is
 
 class PLATFORM_EXPORT BlurFilterOperation : public FilterOperation {
 public:
-    static PassRefPtr<BlurFilterOperation> create(const Length& stdDeviation)
+    static PassRefPtrWillBeRawPtr<BlurFilterOperation> create(const Length& stdDeviation)
     {
-        return adoptRef(new BlurFilterOperation(stdDeviation));
+        return adoptRefWillBeNoop(new BlurFilterOperation(stdDeviation));
     }
 
     const Length& stdDeviation() const { return m_stdDeviation; }
@@ -247,7 +251,7 @@ public:
 
 
 private:
-    virtual PassRefPtr<FilterOperation> blend(const FilterOperation* from, double progress) const override;
+    virtual PassRefPtrWillBeRawPtr<FilterOperation> blend(const FilterOperation* from, double progress) const override;
     virtual bool operator==(const FilterOperation& o) const override
     {
         if (!isSameType(o))
@@ -269,9 +273,9 @@ DEFINE_FILTER_OPERATION_TYPE_CASTS(BlurFilterOperation, BLUR);
 
 class PLATFORM_EXPORT DropShadowFilterOperation : public FilterOperation {
 public:
-    static PassRefPtr<DropShadowFilterOperation> create(const IntPoint& location, int stdDeviation, Color color)
+    static PassRefPtrWillBeRawPtr<DropShadowFilterOperation> create(const IntPoint& location, int stdDeviation, Color color)
     {
-        return adoptRef(new DropShadowFilterOperation(location, stdDeviation, color));
+        return adoptRefWillBeNoop(new DropShadowFilterOperation(location, stdDeviation, color));
     }
 
     int x() const { return m_location.x(); }
@@ -285,7 +289,7 @@ public:
 
 
 private:
-    virtual PassRefPtr<FilterOperation> blend(const FilterOperation* from, double progress) const override;
+    virtual PassRefPtrWillBeRawPtr<FilterOperation> blend(const FilterOperation* from, double progress) const override;
     virtual bool operator==(const FilterOperation& o) const override
     {
         if (!isSameType(o))