Populates Network Isolation Key for network service browser test

Populates Network Isolation Key for network service browser test
to support split cache when it is enabled by default.

Bug: 910708
Change-Id: I4d62b78a61e3a443468ab9be8666e392591f9809
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1899729Reviewed-by: Avi Drissman <avi@chromium.org>
Commit-Queue: Shivani Sharma <shivanisha@chromium.org>
Cr-Commit-Position: refs/heads/master@{#713534}

content/browser/network_service_browsertest.cc

@@ -164,6 +164,11 @@ class NetworkServiceBrowserTest : public ContentBrowserTest {
     std::unique_ptr<network::ResourceRequest> request =
         std::make_unique<network::ResourceRequest>();
     request->url = url;
+    url::Origin origin = url::Origin::Create(url);
+    request->trusted_params = network::ResourceRequest::TrustedParams();
+    request->trusted_params->network_isolation_key =
+        net::NetworkIsolationKey(origin, origin);
+
     SimpleURLLoaderTestHelper simple_loader_helper;
     std::unique_ptr<network::SimpleURLLoader> simple_loader =
         network::SimpleURLLoader::Create(std::move(request),
@@ -256,6 +261,7 @@ IN_PROC_BROWSER_TEST_F(NetworkServiceBrowserTest,
       network::mojom::URLLoaderFactoryParams::New();
   params->process_id = network::mojom::kBrowserProcessId;
   params->is_corb_enabled = false;
+  params->is_trusted = true;
   mojo::Remote<network::mojom::URLLoaderFactory> loader_factory;
   network_context->CreateURLLoaderFactory(
       loader_factory.BindNewPipeAndPassReceiver(), std::move(params));