WIP RasterCanvasLayerAllocator

include/core/SkDevice.h

Index: include/core/SkDevice.h
diff --git a/include/core/SkDevice.h b/include/core/SkDevice.h
index cd13d5482e97d1e32f848d9993771601c7b8d674..b7e9ff4fe329122d4dbfb4d773ae7d3e11224491 100644
--- a/include/core/SkDevice.h
+++ b/include/core/SkDevice.h
@@ -21,6 +21,7 @@ class SkDrawFilter;
 struct SkIRect;
 class SkMatrix;
 class SkMetaData;
+class SkRasterCanvasLayerAllocator;
 class SkRegion;
 class GrRenderTarget;
 
@@ -374,7 +375,9 @@ protected:
      *  and the caller may then decide to explicitly create a bitmapdevice, knowing that later
      *  it could not call drawDevice with it (but it could call drawSprite or drawBitmap).
      */
-    virtual SkBaseDevice* onCreateDevice(const CreateInfo&, const SkPaint*) {
+    virtual SkBaseDevice* onCreateDevice(const CreateInfo&,
+                                         const SkPaint*,
+                                         SkRasterCanvasLayerAllocator*) {
         return NULL;
     }