add roundOut that returns its result

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 242 matching lines @@
             if (!tmpSrc.intersect(bitmapBounds)) {
                 return; // nothing to draw
             }
             // recompute dst, based on the smaller tmpSrc
             matrix.mapRect(&tmpDst, tmpSrc);
             dstPtr = &tmpDst;
         }
 
         // since we may need to clamp to the borders of the src rect within
         // the bitmap, we extract a subset.
-        SkIRect srcIR;
-        tmpSrc.roundOut(&srcIR);
+        const SkIRect srcIR = tmpSrc.roundOut();
         if(bitmap.pixelRef()->getTexture()) {
             // Accelerated source canvas, don't use extractSubset but readPixels to get the subset.
             // This way, the pixels are copied in CPU memory instead of GPU memory.
             bitmap.pixelRef()->readPixels(&tmpBitmap, &srcIR);
         } else {
             if (!bitmap.extractSubset(&tmpBitmap, srcIR)) {
                 return;
             }
         }
         bitmapPtr = &tmpBitmap;
@@ skipping 113 matching lines @@
         paint.getRasterizer() ||
         paint.getPathEffect() ||
         paint.isFakeBoldText() ||
         paint.getStyle() != SkPaint::kFill_Style ||
         !SkXfermode::IsMode(paint.getXfermode(), SkXfermode::kSrcOver_Mode))
     {
         return true;
     }
     return false;
 }