Fix ChromeMockCertVerifier not setting up in-process NS certs

ChromeMockCertVerifier was forgetting to call the parent class methods
that set up the in-process NS cert verifier.

Bug: 908993
Change-Id: I15251a705006c7f5dd1dc99027999e1b8739e416
Reviewed-on: https://chromium-review.googlesource.com/c/1355194Reviewed-by: John Abd-El-Malek <jam@chromium.org>
Commit-Queue: Clark DuVall <cduvall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#612327}

chrome/browser/ssl/cert_verifier_browser_test.cc

@@ -11,11 +11,13 @@ ChromeMockCertVerifier::ChromeMockCertVerifier() = default;
 ChromeMockCertVerifier::~ChromeMockCertVerifier() = default;
 
 void ChromeMockCertVerifier::SetUpInProcessBrowserTestFixture() {
+  ContentMockCertVerifier::SetUpInProcessBrowserTestFixture();
   IOThread::SetCertVerifierForTesting(mock_cert_verifier_internal());
   ProfileIOData::SetCertVerifierForTesting(mock_cert_verifier_internal());
 }
 
 void ChromeMockCertVerifier::TearDownInProcessBrowserTestFixture() {
+  ContentMockCertVerifier::TearDownInProcessBrowserTestFixture();
   IOThread::SetCertVerifierForTesting(nullptr);
   ProfileIOData::SetCertVerifierForTesting(nullptr);
 }