Fix silent truncations when extracting values from CheckedNumeric

chrome/utility/safe_browsing/mac/udif.cc

Index: chrome/utility/safe_browsing/mac/udif.cc
diff --git a/chrome/utility/safe_browsing/mac/udif.cc b/chrome/utility/safe_browsing/mac/udif.cc
index 12d7be518c3035fbc43478ee8088ef413a9c07ee..daefe1028f00e91dbe822f640f7d471cf2d99e0a 100644
--- a/chrome/utility/safe_browsing/mac/udif.cc
+++ b/chrome/utility/safe_browsing/mac/udif.cc
@@ -681,7 +681,9 @@ off_t UDIFPartitionReadStream::Seek(off_t offset, int whence) {
         new UDIFBlockChunkReadStream(stream_, block_size_, chunk));
   }
   current_chunk_ = chunk_number;
-  if (chunk_stream_->Seek(decompress_read_offset.ValueOrDie(), SEEK_SET) == -1)
+  if (chunk_stream_->Seek(
+          base::ValueOrDieForType<off_t>(decompress_read_offset), SEEK_SET) ==
+      -1)
     return -1;
 
   return offset;