WIP RasterCanvasLayerAllocator

include/core/SkBitmapDevice.h

Index: include/core/SkBitmapDevice.h
diff --git a/include/core/SkBitmapDevice.h b/include/core/SkBitmapDevice.h
index d1cb9ad0f8665fd2152ad419621d33df483d2995..5c52d1489a82b79e6da850a3d14a11a376640726 100644
--- a/include/core/SkBitmapDevice.h
+++ b/include/core/SkBitmapDevice.h
@@ -27,6 +27,7 @@ class SkPaint;
 class SkPath;
 class SkPixelRef;
 class SkPixmap;
+class SkRasterCanvasLayerAllocator;
 class SkRRect;
 class SkSurface;
 class SkXfermode;
@@ -158,7 +159,8 @@ private:
     // any clip information.
     void replaceBitmapBackendForRasterSurface(const SkBitmap&) override;
 
-    SkBaseDevice* onCreateDevice(const CreateInfo&, const SkPaint*) override;
+    SkBaseDevice* onCreateDevice(const CreateInfo&, const SkPaint*,
+                                 SkRasterCanvasLayerAllocator*) override;
 
     SkSurface* newSurface(const SkImageInfo&, const SkSurfaceProps&) override;