add assert that the pixelref really did success in requestlock

BUG=skia:
TBR=

Review URL: https://codereview.chromium.org/1142343010

diff --git a/src/core/SkBitmap.cpp b/src/core/SkBitmap.cpp
index b1198d3..563fc28 100644 (file)
--- a/src/core/SkBitmap.cpp
+++ b/src/core/SkBitmap.cpp
@@ -1361,6 +1361,7 @@ bool SkBitmap::requestLock(SkAutoPixmapUnlock* result) const {
     SkPixelRef::LockRequest req = { fInfo.dimensions(), kNone_SkFilterQuality };
     SkPixelRef::LockResult res;
     if (pr->requestLock(req, &res)) {
+        SkASSERT(res.fPixels);
         // The bitmap may be a subset of the pixelref's dimensions
         SkASSERT(fPixelRefOrigin.x() + fInfo.width()  <= res.fSize.width());
         SkASSERT(fPixelRefOrigin.y() + fInfo.height() <= res.fSize.height());