[chromedriver]Implement command: title.

chrome/test/chromedriver/command_executor_impl.cc

Index: chrome/test/chromedriver/command_executor_impl.cc
diff --git a/chrome/test/chromedriver/command_executor_impl.cc b/chrome/test/chromedriver/command_executor_impl.cc
index eb1014f37c2b6543e98db75da0a36ad2413deac3..0b7ab2cb6d77f6dad12b48e09b455712682568b8 100644
--- a/chrome/test/chromedriver/command_executor_impl.cc
+++ b/chrome/test/chromedriver/command_executor_impl.cc
@@ -47,6 +47,8 @@ void CommandExecutorImpl::Init() {
       base::Bind(&ExecuteExecuteScript)));
   command_map_.Set("switchToFrame", base::Bind(execute_session_command,
       base::Bind(&ExecuteSwitchToFrame)));
+  command_map_.Set("getTitle", base::Bind(execute_session_command,
+      base::Bind(&ExecuteGetTitle)));
   Command quit_command = base::Bind(execute_session_command,
       base::Bind(&ExecuteQuit, &session_map_));
   command_map_.Set("quit", quit_command);