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

net/cert/mock_cert_verifier.h

Index: net/cert/mock_cert_verifier.h
diff --git a/net/cert/mock_cert_verifier.h b/net/cert/mock_cert_verifier.h
index b5b35a1a0c4b394ceed7eee852ebd75c5b4a6383..d83645205db0ec5c9cc790dd45682ac4c329431f 100644
--- a/net/cert/mock_cert_verifier.h
+++ b/net/cert/mock_cert_verifier.h
@@ -39,6 +39,10 @@ class MockCertVerifier : public CertVerifier {
     default_result_ = default_result;
   }
 
+  // Controls invocation of the callback. If true, Verify() returns
+  // ERR_IO_PENDING and the callback is invoked with the actual result.
+  void set_async(bool async) { async_ = async; }
+
   // Adds a rule that will cause any call to Verify() for |cert| to return rv,
   // copying |verify_result| into the verified result.
   // Note: Only the primary certificate of |cert| is checked. Any intermediate
@@ -59,6 +63,7 @@ class MockCertVerifier : public CertVerifier {
   typedef std::list<Rule> RuleList;
 
   int default_result_;
+  bool async_;
   RuleList rules_;
 };