Modifications to DisplayList for better Slimming Paint

Source/core/rendering/svg/RenderSVGResourceFilter.cpp

Index: Source/core/rendering/svg/RenderSVGResourceFilter.cpp
diff --git a/Source/core/rendering/svg/RenderSVGResourceFilter.cpp b/Source/core/rendering/svg/RenderSVGResourceFilter.cpp
index 1d33e07aad3af7ee616d19cbc00c4d4b018ac82a..214ba2d448a32627903bb42671e66674e1ea7a66 100644
--- a/Source/core/rendering/svg/RenderSVGResourceFilter.cpp
+++ b/Source/core/rendering/svg/RenderSVGResourceFilter.cpp
@@ -143,7 +143,12 @@ static bool createImageBuffer(const Filter* filter, OwnPtr<ImageBuffer>& imageBu
 
 static void beginDeferredFilter(GraphicsContext* context, FilterData* filterData)
 {
-    context->beginRecording(filterData->boundaries);
+    // FIXME: maybe filterData should just hold onto SourceGraphic after creation?
+    SourceGraphic* sourceGraphic = static_cast<SourceGraphic*>(filterData->builder->getEffectById(SourceGraphic::effectName()));
+    ASSERT(sourceGraphic);
+    RefPtr<DisplayList> sourceGraphicsDisplayList = context->beginRecording(filterData->boundaries);
+    sourceGraphic->setDisplayList(sourceGraphicsDisplayList);
+
     // We pass the boundaries to SkPictureImageFilter so it knows the
     // world-space position of the filter primitives. It gets them
     // from the DisplayList, which also applies the inverse translate
@@ -157,10 +162,7 @@ static void beginDeferredFilter(GraphicsContext* context, FilterData* filterData
 
 static void endDeferredFilter(GraphicsContext* context, FilterData* filterData)
 {
-    // FIXME: maybe filterData should just hold onto SourceGraphic after creation?
-    SourceGraphic* sourceGraphic = static_cast<SourceGraphic*>(filterData->builder->getEffectById(SourceGraphic::effectName()));
-    ASSERT(sourceGraphic);
-    sourceGraphic->setDisplayList(context->endRecording());
+    context->endRecording();
 }
 
 static void drawDeferredFilter(GraphicsContext* context, FilterData* filterData, SVGFilterElement* filterElement)