Auto merge of #15767 - charlesvdv:blob-close, r=nox

Remove support for Blob::{close, isClosed}

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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 #15660

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- [x] There are tests for these changes

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components/script/dom/blob.rs

@@ -18,7 +18,6 @@ use ipc_channel::ipc;
 use net_traits::{CoreResourceMsg, IpcSend};
 use net_traits::blob_url_store::{BlobBuf, get_blob_origin};
 use net_traits::filemanager_thread::{FileManagerThreadMsg, ReadFileProgress, RelativePos};
-use std::cell::Cell;
 use std::mem;
 use std::ops::Index;
 use std::path::PathBuf;
@@ -75,7 +74,6 @@ pub struct Blob {
     blob_impl: DOMRefCell<BlobImpl>,
     /// content-type string
     type_string: String,
-    is_closed: Cell<bool>,
 }
 
 impl Blob {
@@ -95,7 +93,6 @@ impl Blob {
             // NOTE: Guarding the format correctness here,
             // https://w3c.github.io/FileAPI/#dfn-type
             type_string: normalize_type_string(&type_string),
-            is_closed: Cell::new(false),
         }
     }
 
@@ -297,9 +294,7 @@ impl Blob {
 
 impl Drop for Blob {
     fn drop(&mut self) {
-        if !self.IsClosed() {
-            self.clean_up_file_resource();
-        }
+        self.clean_up_file_resource();
     }
 }
 
@@ -375,25 +370,6 @@ impl BlobMethods for Blob {
         let rel_pos = RelativePos::from_opts(start, end);
         Blob::new_sliced(self, rel_pos, content_type.unwrap_or(DOMString::from("")))
     }
-
-    // https://w3c.github.io/FileAPI/#dfn-isClosed
-    fn IsClosed(&self) -> bool {
-        self.is_closed.get()
-    }
-
-    // https://w3c.github.io/FileAPI/#dfn-close
-    fn Close(&self) {
-        // Step 1
-        if self.is_closed.get() {
-            return;
-        }
-
-        // Step 2
-        self.is_closed.set(true);
-
-        // Step 3
-        self.clean_up_file_resource();
-    }
 }
 
 /// Get the normalized, MIME-parsable type string

components/script/dom/filereader.rs

@@ -375,20 +375,11 @@ impl FileReader {
         if self.ready_state.get() == FileReaderReadyState::Loading {
             return Err(Error::InvalidState);
         }
-        // Step 2
-        let global = self.global();
-        if blob.IsClosed() {
-            let exception = DOMException::new(&global, DOMErrorName::InvalidStateError);
-            self.error.set(Some(&exception));
-
-            self.dispatch_progress_event(atom!("error"), 0, None);
-            return Ok(());
-        }
 
-        // Step 3
+        // Step 2
         self.change_ready_state(FileReaderReadyState::Loading);
 
-        // Step 4
+        // Step 3
         let blob_contents = Arc::new(blob.get_bytes().unwrap_or(vec![]));
 
         let type_ = blob.Type();

components/script/dom/url.rs

@@ -3,7 +3,6 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 use dom::bindings::cell::DOMRefCell;
-use dom::bindings::codegen::Bindings::BlobBinding::BlobMethods;
 use dom::bindings::codegen::Bindings::URLBinding::{self, URLMethods};
 use dom::bindings::error::{Error, ErrorResult, Fallible};
 use dom::bindings::js::{MutNullableJS, Root};
@@ -102,12 +101,6 @@ impl URL {
         ///      and should not be trusted. See issue https://github.com/servo/servo/issues/11722
         let origin = get_blob_origin(&global.get_url());
 
-        if blob.IsClosed() {
-            // Generate a dummy id
-            let id = Uuid::new_v4();
-            return DOMString::from(URL::unicode_serialization_blob_url(&origin, &id));
-        }
-
         let id = blob.get_blob_url_id();
 
         DOMString::from(URL::unicode_serialization_blob_url(&origin, &id))
@@ -116,13 +109,10 @@ impl URL {
     // https://w3c.github.io/FileAPI/#dfn-revokeObjectURL
     pub fn RevokeObjectURL(global: &GlobalScope, url: DOMString) {
         /*
-            If the url refers to a Blob that has a readability state of CLOSED OR
-            if the value provided for the url argument is not a Blob URL, OR
+            If the value provided for the url argument is not a Blob URL OR
             if the value provided for the url argument does not have an entry in the Blob URL Store,
 
             this method call does nothing. User agents may display a message on the error console.
-
-            NOTE: The first step is unnecessary, since closed blobs do not exist in the store
         */
         let origin = get_blob_origin(&global.get_url());
 

components/script/dom/webidls/Blob.webidl

@@ -11,21 +11,15 @@ interface Blob {
 
   readonly attribute unsigned long long size;
   readonly attribute DOMString type;
-  readonly attribute boolean isClosed;
-
-  //slice Blob into byte-ranged chunks
 
+  // slice Blob into byte-ranged chunks
   Blob slice([Clamp] optional long long start,
              [Clamp] optional long long end,
              optional DOMString contentType);
-  void close();
-
 };
 
 dictionary BlobPropertyBag {
-
   DOMString type = "";
-
 };
 
 typedef (/*ArrayBuffer or ArrayBufferView or */Blob or DOMString) BlobPart;