Optimize CSS box-shadow performance

src/device/xps/SkXPSDevice.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef UNICODE
 #define UNICODE
 #endif
@@ skipping 1601 matching lines @@
                 filter,  //just to compute how much to draw.
                 &rasteredMask,
                 SkMask::kComputeBoundsAndRenderImage_CreateMode)) {
 
             SkAutoMaskFreeImage rasteredAmi(rasteredMask.fImage);
             mask = &rasteredMask;
 
             //[Mask -> Mask]
             SkMask filteredMask;
             if (filter &&
-                filter->filterMask(&filteredMask, *mask, *d.fMatrix, NULL)) {
+                filter->filterMask(&filteredMask, *mask, *d.fMatrix, NULL, NULL)) {
 
                 mask = &filteredMask;
             } else {
                 filteredMask.fImage = NULL;
             }
             SkAutoMaskFreeImage filteredAmi(filteredMask.fImage);
 
             //Draw mask.
             HRV(this->applyMask(d, *mask, ppuScale, shadedPath.get()));
         }
@@ skipping 25 matching lines @@
                         &matrix,
                         &rasteredMask,
                         SkMask::kComputeBoundsAndRenderImage_CreateMode,
                         paint->getStyle())) {
 
             SkAutoMaskFreeImage rasteredAmi(rasteredMask.fImage);
             mask = &rasteredMask;
 
             //[Mask -> Mask]
             SkMask filteredMask;
-            if (filter->filterMask(&filteredMask,
-                                   rasteredMask,
-                                   matrix,
-                                   NULL)) {
+            if (filter->filterMask(&filteredMask, rasteredMask, matrix, NULL, NULL)) {
                 mask = &filteredMask;
             } else {
                 filteredMask.fImage = NULL;
             }
             SkAutoMaskFreeImage filteredAmi(filteredMask.fImage);
 
             //Draw mask.
             HRV(this->applyMask(d, *mask, ppuScale, shadedPath.get()));
         }
         return;
@@ skipping 592 matching lines @@
              IID_PPV_ARGS(&this->fXpsFactory)),
          "Could not create factory for layer.");
 
     HRVM(this->fXpsFactory->CreateCanvas(&this->fCurrentXpsCanvas),
          "Could not create canvas for layer.");
 }
 
 bool SkXPSDevice::allowImageFilter(const SkImageFilter*) {
     return false;
 }