Intersect SkPictureImageFilter bounds against clip bounds.

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 "SkDevice.h"
 #include "SkCanvas.h"
@@ skipping 51 matching lines @@
                                          SkBitmap* result, SkIPoint* offset) const {
     if (!fPicture) {
         offset->fX = offset->fY = 0;
         return true;
     }
 
     SkRect floatBounds;
     SkIRect bounds;
     ctx.ctm().mapRect(&floatBounds, fCropRect);
     floatBounds.roundOut(&bounds);
+    if (!bounds.intersect(ctx.clipBounds())) {
+        return false;
+    }
 
     if (bounds.isEmpty()) {
         offset->fX = offset->fY = 0;
         return true;
     }
 
     SkAutoTUnref<SkBaseDevice> device(proxy->createDevice(bounds.width(), bounds.height()));
     if (NULL == device.get()) {
         return false;
     }
@@ skipping 10 matching lines @@
     offset->fY = bounds.fTop;
     return true;
 }
 
 bool SkPictureImageFilter::onFilterBounds(const SkIRect& src, const SkMatrix& ctm,
                                           SkIRect* dst) const {
     *dst = src;
     return true;
 }