Fix SkXPSDevice

src/device/xps/SkXPSDevice.cpp

Index: src/device/xps/SkXPSDevice.cpp
diff --git a/src/device/xps/SkXPSDevice.cpp b/src/device/xps/SkXPSDevice.cpp
index c407e2c0d7f59d26139937a39301756e84af6b1f..f2658de1047d3149f358aaa159379c959248d415 100644
--- a/src/device/xps/SkXPSDevice.cpp
+++ b/src/device/xps/SkXPSDevice.cpp
@@ -2453,6 +2453,6 @@ SkXPSDevice::SkXPSDevice(IXpsOMObjectFactory* xpsFactory)
          "Could not create canvas for layer.");
 }
 
-bool SkXPSDevice::allowImageFilter(SkImageFilter*) {
+bool SkXPSDevice::allowImageFilter(const SkImageFilter*) {
     return false;
 }