Add a browsertest suite for net predictor

net/test/embedded_test_server/embedded_test_server_unittest.cc

Index: net/test/embedded_test_server/embedded_test_server_unittest.cc
diff --git a/net/test/embedded_test_server/embedded_test_server_unittest.cc b/net/test/embedded_test_server/embedded_test_server_unittest.cc
index bdd4a826d04bfc24c81151bbbbd3c8600116b112..d9287247964f289f9505ceab7e00b22c138d84ad 100644
--- a/net/test/embedded_test_server/embedded_test_server_unittest.cc
+++ b/net/test/embedded_test_server/embedded_test_server_unittest.cc
@@ -82,7 +82,7 @@ class TestConnectionListener
 
   // Get called from the EmbeddedTestServer thread to be notified that
   // a connection was read from.
-  void ReadFromSocket(const net::StreamSocket& connection) override {
+  void ReadFromSocket(const net::StreamSocket& connection, int rv) override {
     base::AutoLock lock(lock_);
     did_read_from_socket_ = true;
   }