Add missing (and remove superfluous) 'explicit' from constructors.

net/test/base_test_server.h

Index: net/test/base_test_server.h
diff --git a/net/test/base_test_server.h b/net/test/base_test_server.h
index 041faf5a1126a5b4f85b9fec06d633780c18e883..922a3071a63f941293e5afc78b34d3735367fa21 100644
--- a/net/test/base_test_server.h
+++ b/net/test/base_test_server.h
@@ -153,7 +153,7 @@ class BaseTestServer {
   BaseTestServer(Type type,  const std::string& host);
 
   // Initialize a TestServer with a specific set of SSLOptions for HTTPS or WSS.
-  explicit BaseTestServer(Type type, const SSLOptions& ssl_options);
+  BaseTestServer(Type type, const SSLOptions& ssl_options);
 
   // Returns the host port pair used by current Python based test server only
   // if the server is started.
@@ -257,4 +257,3 @@ class BaseTestServer {
 }  // namespace net
 
 #endif  // NET_TEST_BASE_TEST_SERVER_H_
-