[CrossThreadHandle] Convert third_party/blink/renderer/core/loader/im…

…age_loader.cc

This is part of a cleanup task to make memory safer when data isn't used
cross thread, but is instead merely passed to be used back again on the
originating thread. Design doc:
https://docs.google.com/document/d/1GIT0ysdQ84sGhIo1r9EscF_fFt93lmNVM_q4vvHj2FQ/edit#

Bug: 1377337
Change-Id: I5974439bfa936a2fab0cbbe7c9ba791468ed685e

fuzzer infra failure

No-Try: true
Change-Id: I5974439bfa936a2fab0cbbe7c9ba791468ed685e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4048060
Auto-Submit: Ari Chivukula <arichiv@chromium.org>
Reviewed-by: Yoav Weiss <yoavweiss@chromium.org>
Commit-Queue: Ari Chivukula <arichiv@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1075896}

third_party/blink/renderer/core/loader/image_loader.cc

@@ -60,6 +60,7 @@
 #include "third_party/blink/renderer/platform/bindings/exception_state.h"
 #include "third_party/blink/renderer/platform/bindings/script_state.h"
 #include "third_party/blink/renderer/platform/bindings/v8_per_isolate_data.h"
+#include "third_party/blink/renderer/platform/heap/cross_thread_handle.h"
 #include "third_party/blink/renderer/platform/heap/garbage_collected.h"
 #include "third_party/blink/renderer/platform/instrumentation/use_counter.h"
 #include "third_party/blink/renderer/platform/loader/attribution_header_constants.h"
@@ -227,7 +228,8 @@ void ImageLoader::DispatchDecodeRequestsIfComplete() {
     frame->GetChromeClient().RequestDecode(
         frame, image->PaintImageForCurrentFrame(),
         WTF::BindOnce(&ImageLoader::DecodeRequestFinished,
-                      WrapCrossThreadPersistent(this), request->request_id()));
+                      MakeUnwrappingCrossThreadHandle(this),
+                      request->request_id()));
     request->NotifyDecodeDispatched();
     ++it;
   }