Mark existing image filter entry points that will be going away with Deprecated

src/gpu/GrLayerHoister.cpp

Index: src/gpu/GrLayerHoister.cpp
diff --git a/src/gpu/GrLayerHoister.cpp b/src/gpu/GrLayerHoister.cpp
index 842ab56dfbdd1c84d09206a27f4216043af2963e..c39aa2007f9294bd31365906e1b454c32b9fdc62 100644
--- a/src/gpu/GrLayerHoister.cpp
+++ b/src/gpu/GrLayerHoister.cpp
@@ -308,7 +308,8 @@ void GrLayerHoister::FilterLayer(GrContext* context,
     GrWrapTextureInBitmap(layer->texture(), layer->texture()->width(), layer->texture()->height(),
                           false, &src);
 
-    if (!layer->filter()->filterImage(&proxy, src, filterContext, &filteredBitmap, &offset)) {
+    if (!layer->filter()->filterImageDeprecated(&proxy, src, filterContext,
+                                                &filteredBitmap, &offset)) {
         // Filtering failed. Press on with the unfiltered version.
         return;
     }