Include both certificate chains in invalid cert reporting

chrome/browser/net/cert_logger.proto

Index: chrome/browser/net/cert_logger.proto
diff --git a/chrome/browser/net/cert_logger.proto b/chrome/browser/net/cert_logger.proto
index be95005b70d2defe857551e8b7c2c95456ea0124..f27bc40d8bd2a69bcf81755d12bf58a1e45bc3d4 100644
--- a/chrome/browser/net/cert_logger.proto
+++ b/chrome/browser/net/cert_logger.proto
@@ -38,6 +38,10 @@ message CertLoggerRequest {
   // pin contains the string forms of the pins that were matched against for
   // this host.
   repeated string pin = 5;
+  // The certificate chain as received by the client from the server. A
+  // series of PEM-encoded certificates, including intermediates but not
+  // necessarily the root.
+  optional string unverified_server_cert_chain = 6;
 };
 
 // The response sent back to the user.