Change signatures of filter bounds methods to return a rect.

src/gpu/GrLayerHoister.cpp

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrLayerCache.h"
 #include "GrLayerHoister.h"
 #include "GrRecordReplaceDraw.h"
@@ skipping 75 matching lines @@
 // Compute the source rect and return false if it is empty.
 static bool compute_source_rect(const SkLayerInfo::BlockInfo& info, const SkMatrix& initialMat,
                                 const SkIRect& dstIR, SkIRect* srcIR) {
     SkIRect clipBounds = dstIR;
 
     SkMatrix totMat = initialMat;
     totMat.preConcat(info.fPreMat);
     totMat.preConcat(info.fLocalMat);
 
     if (info.fPaint && info.fPaint->getImageFilter()) {
-        info.fPaint->getImageFilter()->filterBounds(clipBounds, totMat, &clipBounds);
+        clipBounds = info.fPaint->getImageFilter()->filterBounds(clipBounds, totMat);
     }
 
     if (!info.fSrcBounds.isEmpty()) {
         SkRect r;
 
         totMat.mapRect(&r, info.fSrcBounds);
         r.roundOut(srcIR);
 
         if (!srcIR->intersect(clipBounds)) {
             return false;
@@ skipping 281 matching lines @@
 #if !GR_CACHE_HOISTED_LAYERS
 
     // This code completely clears out the atlas. It is required when
     // caching is disabled so the atlas doesn't fill up and force more
     // free floating layers
     layerCache->purgeAll();
 #endif
 
     layerCache->end();
 }