Add a CRYPTO_BUFFER_POOL to SSLClientSocketImpl.

net/socket/ssl_client_socket_impl.cc

Index: net/socket/ssl_client_socket_impl.cc
diff --git a/net/socket/ssl_client_socket_impl.cc b/net/socket/ssl_client_socket_impl.cc
index c993fa8fb23da2d1d58c35731b3801a19283ff11..e415a4c3e7c20b6a28bbe5f0b30f886f3300ffc5 100644
--- a/net/socket/ssl_client_socket_impl.cc
+++ b/net/socket/ssl_client_socket_impl.cc
@@ -292,6 +292,9 @@ class SSLClientSocketImpl::SSLContext {
 
     SSL_CTX_set_grease_enabled(ssl_ctx_.get(), 1);
 
+    // Deduplicate all certificates minted from the SSL_CTX in memory.
+    SSL_CTX_set0_buffer_pool(ssl_ctx_.get(), x509_util::GetBufferPool());
+
     if (base::FeatureList::IsEnabled(kShortRecordHeaderFeature)) {
       SSL_CTX_set_short_header_enabled(ssl_ctx_.get(), 1);
     }