Change the tracking request sent by NetErrorHelper from FrameTypeTopLevel to FrameTypeNone.

FrameTypeTopLevel in this case will be considered bad message by PlzNavigate.

This fixes browser tests with PlzNavigate:
ErrorPageTest.DNSError_DoClickLink
ErrorPageTest.DNSError_DoReload
ErrorPageTest.DNSError_DoReloadAfterSamePageNavigation
ErrorPageTest.DNSError_DoSearch
ErrorPageTest.StaleCacheStatus

BUG=576285

Review-Url: https://codereview.chromium.org/2285493002
Cr-Commit-Position: refs/heads/master@{#414660}

chrome/renderer/net/net_error_helper.cc

@@ -297,7 +297,7 @@ void NetErrorHelper::SendTrackingRequest(
   tracking_fetcher_->Start(
       render_frame()->GetWebFrame(),
       blink::WebURLRequest::RequestContextInternal,
-      blink::WebURLRequest::FrameTypeTopLevel,
+      blink::WebURLRequest::FrameTypeNone,
       content::ResourceFetcher::PLATFORM_LOADER,
       base::Bind(&NetErrorHelper::OnTrackingRequestComplete,
                  base::Unretained(this)));

testing/buildbot/filters/browser-side-navigation.linux.browser_tests.filter

@@ -83,9 +83,10 @@
 -ErrorPageAutoReloadTest.IgnoresSamePageNavigation
 -ErrorPageAutoReloadTest.ManualReloadNotSuppressed
 -ErrorPageNavigationCorrectionsFailTest.FetchCorrectionsFails
--ErrorPageTest.DNSError*
+-ErrorPageTest.DNSError_GoBack2
+-ErrorPageTest.DNSError_GoBack2AndForward
+-ErrorPageTest.DNSError_GoBack2Forward2
 -ErrorPageTest.IFrameDNSError_JavaScript
--ErrorPageTest.StaleCacheStatus
 -ExecuteScriptApiTest.ExecuteScriptByFrameId
 -ExecuteScriptApiTest.FrameWithHttp204
 -ExecuteScriptApiTest/DestructiveScriptTest*