[ChromeDriver] Subscribe PerformanceLogger to CommandListener interface

chrome/test/chromedriver/commands.cc

Index: chrome/test/chromedriver/commands.cc
diff --git a/chrome/test/chromedriver/commands.cc b/chrome/test/chromedriver/commands.cc
index 25a7d698647c40c425a005e160caf8015956c0db..6b7e247d6dd29eaaa0c4d57f1e009857c264a776 100644
--- a/chrome/test/chromedriver/commands.cc
+++ b/chrome/test/chromedriver/commands.cc
@@ -151,6 +151,10 @@ void ExecuteSessionCommandOnSessionThread(
     VLOG(0) << "COMMAND " << command_name << " "
             << FormatValueForDisplay(*params);
   }
+
+  // Notify |session|'s |CommandListener|s of the command.
+  NotifySessionListenersBeforeCommand(session, command_name);
+
   scoped_ptr<base::Value> value;
   Status status = command.Run(session, *params, &value);