[DevTools] Report COEP status for service workers

This CL allows DevTools to look up the COEP status of service workers.

Bug: 1122507

Change-Id: I7e1c84d874139479f86d0defd91363edf7d3b10a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2575023Reviewed-by: Sigurd Schneider <sigurds@chromium.org>
Commit-Queue: Wolfgang Beyer <wolfi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#836089}

content/browser/devtools/service_worker_devtools_agent_host.cc

@@ -257,4 +257,10 @@ RenderProcessHost* ServiceWorkerDevToolsAgentHost::GetProcessHost() {
   return RenderProcessHost::FromID(worker_process_id_);
 }
 
+base::Optional<network::CrossOriginEmbedderPolicy>
+ServiceWorkerDevToolsAgentHost::cross_origin_embedder_policy(
+    const std::string&) {
+  return cross_origin_embedder_policy_;
+}
+
 }  // namespace content

content/browser/devtools/service_worker_devtools_agent_host.h

@@ -53,6 +53,8 @@ class ServiceWorkerDevToolsAgentHost : public DevToolsAgentHostImpl {
   NetworkLoaderFactoryParamsAndInfo CreateNetworkFactoryParamsForDevTools()
       override;
   RenderProcessHost* GetProcessHost() override;
+  base::Optional<network::CrossOriginEmbedderPolicy>
+  cross_origin_embedder_policy(const std::string& id) override;
 
   void WorkerRestarted(int worker_process_id, int worker_route_id);
   void WorkerReadyForInspection(

third_party/blink/web_tests/http/tests/inspector-protocol/network/cross-origin-isolation/coop-coep-get-security-isolation-info-service-worker-expected.txt

+Verifies that we can successfully retrieve the security isolation status of a service worker.
+COEP status
+{
+    reportOnlyValue : None
+    value : None
+}
+COOP status
+undefined
+

third_party/blink/web_tests/http/tests/inspector-protocol/network/cross-origin-isolation/coop-coep-get-security-isolation-info-service-worker.js

+(async function(testRunner) {
+  var {page, session, dp} = await testRunner.startBlank(
+    'Verifies that we can successfully retrieve the security isolation status of a service worker.');
+  const swHelper = (await testRunner.loadScript('../../service-worker/resources/service-worker-helper.js'))(dp, session);
+
+  let swdp = null;
+  await dp.Target.setAutoAttach(
+    {autoAttach: true, waitForDebuggerOnStart: false, flatten: true});
+  dp.Target.onAttachedToTarget(async event => {
+    swdp = session.createChild(event.params.sessionId).protocol;
+  });
+
+  const serviceWorkerURL = '/inspector-protocol/service-worker/resources/blank-service-worker.js';
+  await swHelper.installSWAndWaitForActivated(serviceWorkerURL);
+
+  swdp.Network.enable();
+  const {result} = await swdp.Network.getSecurityIsolationStatus({frameId: ''});
+  testRunner.log(`COEP status`);
+  testRunner.log(result.status.coep);
+  testRunner.log(`COOP status`);
+  testRunner.log(result.status.coop);
+
+  testRunner.completeTest();
+});