Make filters use SkImage instead of SkBitmap

src/utils/SkDeferredCanvas.cpp

Index: src/utils/SkDeferredCanvas.cpp
diff --git a/src/utils/SkDeferredCanvas.cpp b/src/utils/SkDeferredCanvas.cpp
index 1e955b378239a421c1e1968529e518bd9170e415..abcc6a351db0ef436cba4788d36eb5f743f4510a 100644
--- a/src/utils/SkDeferredCanvas.cpp
+++ b/src/utils/SkDeferredCanvas.cpp
@@ -252,8 +252,9 @@ protected:
     bool canHandleImageFilter(const SkImageFilter*) SK_OVERRIDE {
         return false;
     }
-    virtual bool filterImage(const SkImageFilter*, const SkBitmap&,
-                             const SkImageFilter::Context&, SkBitmap*, SkIPoint*) SK_OVERRIDE {
+    virtual bool filterImage(const SkImageFilter*, const SkImage*,
+                             const SkImageFilter::Context&,
+                             SkAutoTUnref<const SkImage>&, SkIPoint*) SK_OVERRIDE {
         return false;
     }