Fix classes that have too many virtuals for inline constructors.

net/quic/crypto/proof_verifier_chromium.cc

Index: net/quic/crypto/proof_verifier_chromium.cc
diff --git a/net/quic/crypto/proof_verifier_chromium.cc b/net/quic/crypto/proof_verifier_chromium.cc
index 2cf7298756fc2699c8d24e836e46a040957f6fb3..7a794e742295a077fe1c338a48cb8d464b25ce3f 100644
--- a/net/quic/crypto/proof_verifier_chromium.cc
+++ b/net/quic/crypto/proof_verifier_chromium.cc
@@ -35,6 +35,8 @@ using std::vector;
 
 namespace net {
 
+ProofVerifyDetailsChromium::ProofVerifyDetailsChromium() = default;
+
 ProofVerifyDetails* ProofVerifyDetailsChromium::Clone() const {
   ProofVerifyDetailsChromium* other = new ProofVerifyDetailsChromium;
   other->cert_verify_result = cert_verify_result;