WIP RasterCanvasLayerAllocator experiment 2

src/pdf/SkPDFDevice.cpp

Index: src/pdf/SkPDFDevice.cpp
diff --git a/src/pdf/SkPDFDevice.cpp b/src/pdf/SkPDFDevice.cpp
index 608d284bf2befcc30ec8043a2014a8c7c5a9178a..7078ed60f27df3b02c0ea3d9322be9385d160008 100644
--- a/src/pdf/SkPDFDevice.cpp
+++ b/src/pdf/SkPDFDevice.cpp
@@ -346,7 +346,8 @@ static bool not_supported_for_layers(const SkPaint& layerPaint) {
     return layerPaint.getImageFilter() != nullptr;
 }
 
-SkBaseDevice* SkPDFDevice::onCreateDevice(const CreateInfo& cinfo, const SkPaint* layerPaint) {
+SkBaseDevice* SkPDFDevice::onCreateDevice(const CreateInfo& cinfo, const SkPaint* layerPaint,
+                                          SkRasterCanvasLayerAllocator*) {
     if (layerPaint && not_supported_for_layers(*layerPaint)) {
         // need to return a raster device, which we will detect in drawDevice()
         return SkBitmapDevice::Create(cinfo.fInfo, SkSurfaceProps(0, kUnknown_SkPixelGeometry));