Add --ignore-certificate-errors-spki-list switch and UMA histogram.

net/cert/mock_cert_verifier.cc

Index: net/cert/mock_cert_verifier.cc
diff --git a/net/cert/mock_cert_verifier.cc b/net/cert/mock_cert_verifier.cc
index 9cbbafd3cfe91e331348d3247d7457c055d28934..f9e5258db3a1d6ff31f05d2d258b97fa910984f4 100644
--- a/net/cert/mock_cert_verifier.cc
+++ b/net/cert/mock_cert_verifier.cc
@@ -36,7 +36,8 @@ struct MockCertVerifier::Rule {
   int rv;
 };
 
-MockCertVerifier::MockCertVerifier() : default_result_(ERR_CERT_INVALID) {}
+MockCertVerifier::MockCertVerifier()
+    : default_result_(ERR_CERT_INVALID), async_(false) {}
 
 MockCertVerifier::~MockCertVerifier() {}
 
@@ -46,6 +47,7 @@ int MockCertVerifier::Verify(const RequestParams& params,
                              const CompletionCallback& callback,
                              std::unique_ptr<Request>* out_req,
                              const NetLogWithSource& net_log) {
+  int result;
   RuleList::const_iterator it;
   for (it = rules_.begin(); it != rules_.end(); ++it) {
     // Check just the server cert. Intermediates will be ignored.
@@ -54,13 +56,21 @@ int MockCertVerifier::Verify(const RequestParams& params,
     if (!base::MatchPattern(params.hostname(), it->hostname))
       continue;
     *verify_result = it->result;
-    return it->rv;
+    result = it->rv;
+    goto exit;

[Ryan Sleevi, 2017/04/07 16:08:05]

We don't use goto in Chromium code

[martinkr, 2017/04/07 21:40:57]

Done.

   }
 
   // Fall through to the default.
   verify_result->verified_cert = params.certificate();
   verify_result->cert_status = MapNetErrorToCertStatus(default_result_);
-  return default_result_;
+  result = default_result_;
+
+exit:
+  if (async_) {
+    callback.Run(result);
+    return ERR_IO_PENDING;
+  }
+  return result;
 }
 
 void MockCertVerifier::AddResultForCert(scoped_refptr<X509Certificate> cert,