Add support for walking and modifying the CachingCertVerifier

net/cert/cert_verifier.cc

Index: net/cert/cert_verifier.cc
diff --git a/net/cert/cert_verifier.cc b/net/cert/cert_verifier.cc
index f6aa2df898e65e0adb3db3af623468187f9f13ed..d60e65e86bf6a888c4088784ac7381f69a90d6bc 100644
--- a/net/cert/cert_verifier.cc
+++ b/net/cert/cert_verifier.cc
@@ -63,6 +63,11 @@ CertVerifier::RequestParams::RequestParams(const RequestParams& other) =
     default;
 CertVerifier::RequestParams::~RequestParams() {}
 
+bool CertVerifier::RequestParams::operator==(
+    const CertVerifier::RequestParams& other) const {
+  return key_ == other.key_;
+}
+
 bool CertVerifier::RequestParams::operator<(
     const CertVerifier::RequestParams& other) const {
   return key_ < other.key_;