[chromedriver] Implement SwitchToFrame command.

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 ee8a1bd5d6e7ed68a9462db3639ab4aa5a20a401..eb1014f37c2b6543e98db75da0a36ad2413deac3 100644
--- a/chrome/test/chromedriver/command_executor_impl.cc
+++ b/chrome/test/chromedriver/command_executor_impl.cc
@@ -45,6 +45,8 @@ void CommandExecutorImpl::Init() {
       base::Bind(&ExecuteGet)));
   command_map_.Set("executeScript", base::Bind(execute_session_command,
       base::Bind(&ExecuteExecuteScript)));
+  command_map_.Set("switchToFrame", base::Bind(execute_session_command,
+      base::Bind(&ExecuteSwitchToFrame)));
   Command quit_command = base::Bind(execute_session_command,
       base::Bind(&ExecuteQuit, &session_map_));
   command_map_.Set("quit", quit_command);