Report unreadable files as size zero when uploading.

net/base/upload_data_stream_unittest.cc

Index: net/base/upload_data_stream_unittest.cc
diff --git a/net/base/upload_data_stream_unittest.cc b/net/base/upload_data_stream_unittest.cc
index 701bad96ece310a230ef231ded11334e09a32b6a..92c065ed51e65e01d2af123629012e4499b6fe48 100644
--- a/net/base/upload_data_stream_unittest.cc
+++ b/net/base/upload_data_stream_unittest.cc
@@ -78,7 +78,9 @@ TEST_F(UploadDataStreamTest, FileSmallerThanLength) {
     read_counter += stream->buf_len();
     stream->DidConsume(stream->buf_len());
   }
-  EXPECT_LT(read_counter, stream->size());
+  // UpdateDataStream will pad out the file with 0 bytes so that the HTTP
+  // transaction doesn't hang.  Therefore we expected the full size.
+  EXPECT_EQ(read_counter, stream->size());
 
   file_util::Delete(temp_file_path, false);
 }