AW: explicitly configure ct_policy and ftp support

No change to behavior, this only re-applies default settings for the
sake of explicitly declaring our support.

This sets ct_policy and ftp_url_support to false.

R=changwan@chromium.org

Cq-Include-Trybots: master.tryserver.chromium.android:android_mojo
Bug: 887538
Test: None
Change-Id: Ie05fbe7f64c2b599227223d76c697f2624d69c62
Reviewed-on: https://chromium-review.googlesource.com/c/1357630Reviewed-by: Changwan Ryu <changwan@chromium.org>
Commit-Queue: Nate Fischer <ntfschr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#613210}

android_webview/browser/aw_content_browser_client.cc

@@ -272,6 +272,12 @@ network::mojom::NetworkContextPtr AwContentBrowserClient::CreateNetworkContext(
   context_params->http_cache_max_size = 20 * 1024 * 1024;  // 20M
   context_params->http_cache_path = AwBrowserContext::GetCacheDir();
 
+  // WebView does not currently support Certificate Transparency.
+  context_params->enforce_chrome_ct_policy = false;
+
+  // WebView does not support ftp yet.
+  context_params->enable_ftp_url_support = false;
+
   content::GetNetworkService()->CreateNetworkContext(
       MakeRequest(&network_context), std::move(context_params));