Cleanup and minor refactoring of LogDnsClient

components/certificate_transparency/log_dns_client.h

Index: components/certificate_transparency/log_dns_client.h
diff --git a/components/certificate_transparency/log_dns_client.h b/components/certificate_transparency/log_dns_client.h
index ded22255d2dce5fb5454efa03545ed6946cb4935..f3966a8d2b2170447144d303374e1e250840315c 100644
--- a/components/certificate_transparency/log_dns_client.h
+++ b/components/certificate_transparency/log_dns_client.h
@@ -67,29 +67,27 @@ class LogDnsClient : public net::NetworkChangeNotifier::DNSObserver {
   // suffix for all queries.
   // The |leaf_hash| is the SHA-256 Merkle leaf hash (see RFC6962, section 2.1).
   // The size of the CT log tree, for which the proof is requested, must be
   // provided in |tree_size|.
   // The leaf index and audit proof obtained from the CT log will be placed in
-  // |proof|.
+  // |out_proof|.
   // If the proof cannot be obtained synchronously, this method will return
   // net::ERR_IO_PENDING and invoke |callback| once the query is complete.
   // Returns:
   // - net::OK if the query was successful.
   // - net::ERR_IO_PENDING if the query was successfully started and is
   //   continuing asynchronously.
   // - net::ERR_TEMPORARILY_THROTTLED if the maximum number of concurrent
   //   queries are already in progress. Try again later.
-  //   TODO(robpercival): Provide a mechanism to notify the caller when no
-  //   longer throttled.
   // - net::ERR_NAME_RESOLUTION_FAILED if DNS queries are not possible.
   //   Check that the DnsConfig returned by NetworkChangeNotifier is valid.
   // - net::ERR_INVALID_ARGUMENT if an argument is invalid, e.g. |leaf_hash| is
   //   not a SHA-256 hash.
   net::Error QueryAuditProof(base::StringPiece domain_for_log,
                              std::string leaf_hash,
                              uint64_t tree_size,
-                             net::ct::MerkleAuditProof* proof,
+                             net::ct::MerkleAuditProof* out_proof,
                              const net::CompletionCallback& callback);
 
  private:
   class AuditProofQuery;