Auto merge of #12258 - izgzhen:remove-data-slice, r=Manishearth

Remove DataSlice, fix #12249

r? @Manishearth

---
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- [x] `./mach build -d` does not report any errors
- [x] `./mach test-tidy` does not report any errors
- [x] These changes fix #12249

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- [ ] There are tests for these changes OR
- [ ] These changes do not require tests because _____

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tests/unit/script/dom/blob.rs

@@ -1,34 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-use script::dom::blob::DataSlice;
-use std::sync::Arc;
-
-#[test]
-fn test_data_slice_without_start_end_should_match_buffer_size() {
-    let bytes = Arc::new(vec![1u8, 2u8, 3u8]);
-    let data = DataSlice::new(bytes, None, None);
-    assert_eq!(data.size(), 3);
-}
-
-#[test]
-fn test_data_slice_should_prevent_reverse_bounds() {
-    let bytes = Arc::new(vec![1u8, 2, 3, 4, 5]);
-    let start = Some(3);
-    let end = Some(1);
-
-    let data = DataSlice::new(bytes, start, end);
-    assert_eq!(data.size(), 0);
-}
-
-#[test]
-fn test_data_slice_should_respect_correct_bounds() {
-    let bytes = Arc::new(vec![1u8, 2, 3, 4, 5]);
-    let start = Some(1);
-    let end = Some(3);
-
-    let data = DataSlice::new(bytes, start, end);
-    let expected = [2u8, 3];
-    assert_eq!(&expected, data.get_bytes());
-}

tests/unit/script/lib.rs

@@ -12,6 +12,3 @@ extern crate url;
 #[cfg(test)] mod origin;
 #[cfg(all(test, target_pointer_width = "64"))] mod size_of;
 #[cfg(test)] mod textinput;
-#[cfg(test)] mod dom {
-    mod blob;
-}