Add nested SkPictureImageFilters to the GPU veto.

src/effects/SkPictureImageFilter.cpp

 /*
  * Copyright 2013 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkPictureImageFilter.h"
 
 #include "SkCanvas.h"
@@ skipping 183 matching lines @@
         SkPaint paint;
         paint.setFilterQuality(fFilterQuality);
 
         localImg->draw(canvas,
                        SkIntToScalar(localIBounds.fLeft),
                        SkIntToScalar(localIBounds.fTop),
                        &paint);
     }
 }
 
+int SkPictureImageFilter::numSlowPaths() const {
+    return fPicture ? fPicture->numSlowPaths() : 0;
+}
+
 #ifndef SK_IGNORE_TO_STRING
 void SkPictureImageFilter::toString(SkString* str) const {
     str->appendf("SkPictureImageFilter: (");
     str->appendf("crop: (%f,%f,%f,%f) ",
                  fCropRect.fLeft, fCropRect.fTop, fCropRect.fRight, fCropRect.fBottom);
     if (fPicture) {
         str->appendf("picture: (%f,%f,%f,%f)",
                      fPicture->cullRect().fLeft, fPicture->cullRect().fTop,
                      fPicture->cullRect().fRight, fPicture->cullRect().fBottom);
     }
     str->append(")");
 }
 #endif