Make filters use SkImage instead of SkBitmap

src/effects/SkComposeImageFilter.cpp

Index: src/effects/SkComposeImageFilter.cpp
diff --git a/src/effects/SkComposeImageFilter.cpp b/src/effects/SkComposeImageFilter.cpp
index 2b1606a8a40b0a12570af65416754eb698a0cb5c..a528acac48c2a3bb867add8c65140b9495ac719b 100644
--- a/src/effects/SkComposeImageFilter.cpp
+++ b/src/effects/SkComposeImageFilter.cpp
@@ -23,17 +23,17 @@ void SkComposeImageFilter::computeFastBounds(const SkRect& src, SkRect* dst) con
 }
 
 bool SkComposeImageFilter::onFilterImage(Proxy* proxy,
-                                         const SkBitmap& src,
+                                         const SkImage* src,
                                          const Context& ctx,
-                                         SkBitmap* result,
+                                         SkAutoTUnref<const SkImage>& result,
                                          SkIPoint* offset) const {
     SkImageFilter* outer = getInput(0);
     SkImageFilter* inner = getInput(1);
 
-    SkBitmap tmp;
+    SkAutoTUnref<const SkImage> tmp;
     SkIPoint innerOffset = SkIPoint::Make(0, 0);
     SkIPoint outerOffset = SkIPoint::Make(0, 0);
-    if (!inner->filterImage(proxy, src, ctx, &tmp, &innerOffset))
+    if (!inner->filterImage(proxy, src, ctx, tmp, &innerOffset))
         return false;
 
     SkMatrix outerMatrix(ctx.ctm());