Two malloc+bzero -> calloc.

I was profiling DM and noticed a couple spots where we malloc then bzero.
These might as well call calloc instead:
   - any time DM itself allocates bitmaps for raster drawing;
   - any time Skia allocates memory for a raster SkSurface.

We could use malloc for opaque surfaces, but it seems simpler to always calloc.

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1557713003

Review URL: https://codereview.chromium.org/1557713003

1 files changed, 5 insertions, 2 deletions

diff --git a/dm/DMSrcSink.cpp b/dm/DMSrcSink.cpp
index 5bc5e5a30d..fa600ff4eb 100644
--- a/dm/DMSrcSink.cpp
+++ b/dm/DMSrcSink.cpp
@@ -14,6 +14,7 @@
 #include "SkDocument.h"
 #include "SkError.h"
 #include "SkImageGenerator.h"
+#include "SkMallocPixelRef.h"
 #include "SkMultiPictureDraw.h"
 #include "SkNullCanvas.h"
 #include "SkOSFile.h"
@@ -973,8 +974,10 @@ Error RasterSink::draw(const Src& src, SkBitmap* dst, SkWStream*, SkString*) con
     SkAlphaType alphaType = kPremul_SkAlphaType;
     (void)SkColorTypeValidateAlphaType(fColorType, alphaType, &alphaType);
 
-    dst->allocPixels(SkImageInfo::Make(size.width(), size.height(), fColorType, alphaType));
-    dst->eraseColor(SK_ColorTRANSPARENT);
+    SkMallocPixelRef::ZeroedPRFactory factory;
+    dst->allocPixels(SkImageInfo::Make(size.width(), size.height(), fColorType, alphaType),
+                     &factory,
+                     nullptr/*colortable*/);
     SkCanvas canvas(*dst);
     return src.draw(&canvas);
 }