Merge "Fix overflow in NinePatchImpl." into mnc-dev

    const int bitmapWidth = bitmap.width();

    const int bitmapHeight = bitmap.height();

    SkScalar* dstRights = (SkScalar*) alloca((numXDivs + 1) * sizeof(SkScalar));

    // Number of bytes needed for dstRights array.

    // Need to cast numXDivs to a larger type to avoid overflow.

    const size_t dstBytes = ((size_t) numXDivs + 1) * sizeof(SkScalar);

    SkScalar* dstRights = (SkScalar*) alloca(dstBytes);

    bool dstRightsHaveBeenCached = false;

    int numStretchyXPixelsRemaining = 0;