Apply the layer's image filter to the hoisted image

src/gpu/SkGpuDevice.h

Index: src/gpu/SkGpuDevice.h
diff --git a/src/gpu/SkGpuDevice.h b/src/gpu/SkGpuDevice.h
index 2fb6de7eb8564c871ceb5cf25bb0b3d5fa105036..9023a630e8961e79b36dda9e1631cd904acee4ec 100644
--- a/src/gpu/SkGpuDevice.h
+++ b/src/gpu/SkGpuDevice.h
@@ -124,6 +124,10 @@ public:
                              const SkImageFilter::Context&,
                              SkBitmap*, SkIPoint*) SK_OVERRIDE;
 
+    bool filterTexture(GrContext*, GrTexture*, const SkImageFilter*,
+                       const SkImageFilter::Context&,
+                       SkBitmap* result, SkIPoint* offset);
+
 protected:
     virtual bool onReadPixels(const SkImageInfo&, void*, size_t, int, int) SK_OVERRIDE;
     virtual bool onWritePixels(const SkImageInfo&, const void*, size_t, int, int) SK_OVERRIDE;
@@ -203,10 +207,6 @@ private:
 
     bool drawDashLine(const SkPoint pts[2], const SkPaint& paint);
 
-    bool filterTexture(GrContext*, GrTexture*, const SkImageFilter*,
-                       const SkImageFilter::Context&,
-                       SkBitmap* result, SkIPoint* offset);
-
     static SkPicture::AccelData::Key ComputeAccelDataKey();
 
     typedef SkBaseDevice INHERITED;