Fix flaky CertNetFetcherURLLoaderTest

The ReconnectsAfterURLLoaderFactoryDisconnection test checks that
there have been at most two requests after the URLLoaderFactory
disconnects and reconnects, but it should have been checking for
at least two requests.

Bug: 1168193
Change-Id: I7c816e433a10e043e70dc1032519b8795253dd3a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2641141
Commit-Queue: Ryan Sleevi <rsleevi@chromium.org>
Auto-Submit: Matthew Denton <mpdenton@chromium.org>
Reviewed-by: Ryan Sleevi <rsleevi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#845671}

services/cert_verifier/cert_net_url_loader/cert_net_fetcher_url_loader_unittest.cc

@@ -499,7 +499,7 @@ TEST_F(CertNetFetcherURLLoaderTest,
     request1->WaitForResult(&error, &body);
   }
 
-  EXPECT_GE(2, NumCreatedRequests());
+  EXPECT_LE(2, NumCreatedRequests());
 
   ResetTestURLLoaderFactory();