setDrawFilter needs to trigger any deferred saves

src/core/SkCanvas.cpp

 /*
  * Copyright 2008 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 "SkCanvas.h"
 #include "SkCanvasPriv.h"
 #include "SkBitmapDevice.h"
@@ skipping 571 matching lines @@
     SkDELETE(fMetaData);
 
     dec_canvas();
 }
 
 SkDrawFilter* SkCanvas::getDrawFilter() const {
     return fMCRec->fFilter;
 }
 
 SkDrawFilter* SkCanvas::setDrawFilter(SkDrawFilter* filter) {
+    this->checkForDeferredSave();
     SkRefCnt_SafeAssign(fMCRec->fFilter, filter);
     return filter;
 }
 
 SkMetaData& SkCanvas::getMetaData() {
     // metadata users are rare, so we lazily allocate it. If that changes we
     // can decide to just make it a field in the device (rather than a ptr)
     if (NULL == fMetaData) {
         fMetaData = new SkMetaData;
     }
@@ skipping 1957 matching lines @@
     }
 
     if (matrix) {
         canvas->concat(*matrix);
     }
 }
 
 SkAutoCanvasMatrixPaint::~SkAutoCanvasMatrixPaint() {
     fCanvas->restoreToCount(fSaveCount);
 }