support scaledimagecache instantiable using discardablememory

src/core/SkBitmapProcState.cpp

Index: src/core/SkBitmapProcState.cpp
diff --git a/src/core/SkBitmapProcState.cpp b/src/core/SkBitmapProcState.cpp
index 59483d66a151ca6a4172a4c7289d4eb60a9949f1..c93a2b5cd7799fc12d6627fdf7c259e711a9cc76 100644
--- a/src/core/SkBitmapProcState.cpp
+++ b/src/core/SkBitmapProcState.cpp
@@ -147,7 +147,8 @@ bool SkBitmapProcState::possiblyScaleImage() {
                                         SkBitmapScaler::RESIZE_BEST,
                                         dest_width,
                                         dest_height,
-                                        simd)) {
+                                        simd,
+                                        SkScaledImageCache::GetAllocator())) {
                 // we failed to create fScaledBitmap, so just return and let
                 // the scanline proc handle it.
                 return false;