Add nested SkPictureImageFilters to the GPU veto.

src/core/SkPictureCommon.h

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 // Some shared code used by both SkBigPicture and SkMiniPicture.
 //   SkTextHunter   -- SkRecord visitor that returns true when the op draws text.
 //   SkBitmapHunter -- SkRecord visitor that returns true when the op draws a bitmap or image.
@@ skipping 73 matching lines @@
     void operator()(const SkRecords::DrawPicture& op) {
         fNumSlowPathsAndDashEffects += op.picture->numSlowPaths();
     }
     void operator()(const SkRecords::DrawDrawable&) { /* TODO */ }
 
     void checkPaint(const SkPaint* paint) {
         if (paint && paint->getPathEffect()) {
             // Initially assume it's slow.
             fNumSlowPathsAndDashEffects++;
         }
+        if (paint && paint->getImageFilter()) {
+            fNumSlowPathsAndDashEffects += paint->getImageFilter()->numSlowPaths();
+        }
     }
 
     void operator()(const SkRecords::DrawPoints& op) {
         this->checkPaint(&op.paint);
         const SkPathEffect* effect = op.paint.getPathEffect();
         if (effect) {
             SkPathEffect::DashInfo info;
             SkPathEffect::DashType dashType = effect->asADash(&info);
             if (2 == op.count && SkPaint::kRound_Cap != op.paint.getStrokeCap() &&
                 SkPathEffect::kDash_DashType == dashType && 2 == info.fCount) {
@@ skipping 33 matching lines @@
     template <typename T>
     SK_WHEN(T::kTags & SkRecords::kDraw_Tag, void) operator()(const T& op) {
         this->checkPaint(AsPtr(op.paint));
     }
 
     template <typename T>
     SK_WHEN(!(T::kTags & SkRecords::kDraw_Tag), void) operator()(const T& op) { /* do nothing */ }
 
     int fNumSlowPathsAndDashEffects;
 };