tunnel down texture-size-constraint to imagefilters

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 293 matching lines @@
     totMat.preConcat(info.fPreMat);
     totMat.preConcat(info.fLocalMat);
     totMat.postTranslate(-SkIntToScalar(filterOffset.fX), -SkIntToScalar(filterOffset.fY));
 
     SkASSERT(0 == layer->rect().fLeft && 0 == layer->rect().fTop);
     SkIRect clipBounds = layer->rect();
 
     // This cache is transient, and is freed (along with all its contained
     // textures) when it goes out of scope.
     SkAutoTUnref<SkImageFilter::Cache> cache(SkImageFilter::Cache::Create(kDefaultCacheSize));
-    SkImageFilter::Context filterContext(totMat, clipBounds, cache);
+    SkImageFilter::Context filterContext(totMat, clipBounds, cache, SkImageFilter::kApprox_SizeConstraint);
 
     SkImageFilter::DeviceProxy proxy(device);
     const SkBitmap src = wrap_texture(layer->texture());
 
     if (!layer->filter()->filterImage(&proxy, src, filterContext, &filteredBitmap, &offset)) {
         // Filtering failed. Press on with the unfiltered version.
         return;
     }
 
     SkIRect newRect = SkIRect::MakeWH(filteredBitmap.width(), filteredBitmap.height());
@@ skipping 58 matching lines @@
 void GrLayerHoister::PurgeCache(GrContext* context) {
 #if !GR_CACHE_HOISTED_LAYERS
     GrLayerCache* layerCache = context->getLayerCache();
 
     // 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
 }