Add canFilterMaskGPU & filterMaskGPU to SkMaskFilter

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 1524 matching lines @@
     //swap current canvas to new canvas
     this->fCurrentXpsCanvas.swap(newCanvas);
 
     return S_OK;
 }
 
 void SkXPSDevice::convertToPpm(const SkMaskFilter* filter,
                                SkMatrix* matrix,
                                SkVector* ppuScale,
                                const SkIRect& clip, SkIRect* clipIRect) {
-    //TODO: currently ignoring the ppm if blur ignoring transform.
-    if (filter) {
-        SkMaskFilter::BlurInfo blurInfo;
-        SkMaskFilter::BlurType blurType = filter->asABlur(&blurInfo);
-
-        if (SkMaskFilter::kNone_BlurType != blurType
-            && blurInfo.fIgnoreTransform) {
-
-            ppuScale->fX = SK_Scalar1;
-            ppuScale->fY = SK_Scalar1;
-            *clipIRect = clip;
-            return;
-        }
-    }
-
     //This action is in unit space, but the ppm is specified in physical space.
     ppuScale->fX = SkScalarDiv(this->fCurrentPixelsPerMeter.fX,
                                this->fCurrentUnitsPerMeter.fX);
     ppuScale->fY = SkScalarDiv(this->fCurrentPixelsPerMeter.fY,
                                this->fCurrentUnitsPerMeter.fY);
 
     matrix->postScale(ppuScale->fX, ppuScale->fY);
 
     const SkIRect& irect = clip;
     SkRect clipRect = SkRect::MakeLTRB(
@@ skipping 892 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(SkImageFilter*) {
     return false;
 }