CookieStore: Update TaskType to DOMManipulation

This change updates TaskType to match the spec from
kMiscPlatformAPI to kDOMManipulation. Further
discussion can be found here:
https://github.com/WICG/cookie-store/issues/159

Bug: 1128057
Change-Id: Ic1066280d7810328f70881772d51066f852b1803
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2412699Reviewed-by: Victor Costan <pwnall@chromium.org>
Commit-Queue: Victor Costan <pwnall@chromium.org>
Commit-Queue: Ayu Ishii <ayui@chromium.org>
Cr-Commit-Position: refs/heads/master@{#807241}

third_party/blink/renderer/modules/cookie_store/cookie_store.cc

@@ -515,7 +515,7 @@ void CookieStore::StartObserving() {
 
   // See https://bit.ly/2S0zRAS for task types.
   auto task_runner =
-      GetExecutionContext()->GetTaskRunner(TaskType::kMiscPlatformAPI);
+      GetExecutionContext()->GetTaskRunner(TaskType::kDOMManipulation);
   backend_->AddChangeListener(
       default_cookie_url_, default_site_for_cookies_, default_top_frame_origin_,
       change_listener_receiver_.BindNewPipeAndPassRemote(task_runner), {});

third_party/blink/renderer/modules/cookie_store/global_cookie_store.cc

@@ -52,7 +52,7 @@ class GlobalCookieStoreImpl final
       mojo::Remote<network::mojom::blink::RestrictedCookieManager> backend;
       execution_context->GetBrowserInterfaceBroker().GetInterface(
           backend.BindNewPipeAndPassReceiver(
-              execution_context->GetTaskRunner(TaskType::kMiscPlatformAPI)));
+              execution_context->GetTaskRunner(TaskType::kDOMManipulation)));
       cookie_store_ = MakeGarbageCollected<CookieStore>(execution_context,
                                                         std::move(backend));
     }

third_party/blink/renderer/modules/cookie_store/service_worker_registration_cookies.cc

@@ -55,11 +55,9 @@ class ServiceWorkerRegistrationCookiesImpl final
       HeapMojoRemote<mojom::blink::CookieStore,
                      HeapMojoWrapperMode::kWithoutContextObserver>
           backend(execution_context);
-      // TODO(pwnall): Replace TaskType::kInternalDefault with the task queue in
-      //               the Cookie Store spec, once that spec is finalized.
       execution_context->GetBrowserInterfaceBroker().GetInterface(
           backend.BindNewPipeAndPassReceiver(
-              execution_context->GetTaskRunner(TaskType::kInternalDefault)));
+              execution_context->GetTaskRunner(TaskType::kDOMManipulation)));
       cookie_store_manager_ = MakeGarbageCollected<CookieStoreManager>(
           registration_, std::move(backend));
     }