Add useDFT field to SkDeviceProperties

src/core/SkBitmapDevice.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkBitmapDevice.h"
 #include "SkConfig8888.h"
 #include "SkDeviceProperties.h"
@@ skipping 99 matching lines @@
 }
 
 void SkBitmapDevice::replaceBitmapBackendForRasterSurface(const SkBitmap& bm) {
     SkASSERT(bm.width() == fBitmap.width());
     SkASSERT(bm.height() == fBitmap.height());
     fBitmap = bm;   // intent is to use bm's pixelRef (and rowbytes/config)
     fBitmap.lockPixels();
 }
 
 SkBaseDevice* SkBitmapDevice::onCreateDevice(const CreateInfo& cinfo, const SkPaint*) {
-    SkDeviceProperties leaky(cinfo.fPixelGeometry);
+    const SkDeviceProperties leaky(cinfo.fPixelGeometry);
     return SkBitmapDevice::Create(cinfo.fInfo, &leaky);
 }
 
 const SkBitmap& SkBitmapDevice::onAccessBitmap() {
     return fBitmap;
 }
 
 bool SkBitmapDevice::onAccessPixels(SkPixmap* pmap) {
     if (fBitmap.lockPixelsAreWritable() && this->onPeekPixels(pmap)) {
         fBitmap.notifyPixelsChanged();
@@ skipping 244 matching lines @@
         paint.getRasterizer() ||
         paint.getPathEffect() ||
         paint.isFakeBoldText() ||
         paint.getStyle() != SkPaint::kFill_Style ||
         !SkXfermode::IsMode(paint.getXfermode(), SkXfermode::kSrcOver_Mode))
     {
         return true;
     }
     return false;
 }