Fix command handler for /session/:sessionId/execute (execute_script) for

chrome/test/webdriver/commands/execute_command.h

Index: chrome/test/webdriver/commands/execute_command.h
diff --git a/chrome/test/webdriver/commands/execute_command.h b/chrome/test/webdriver/commands/execute_command.h
index 9a578541277c6c9e1916e346e6080d9552a58499..5981919521004ae50ed7b696923a0a05b6f7258d 100644
--- a/chrome/test/webdriver/commands/execute_command.h
+++ b/chrome/test/webdriver/commands/execute_command.h
@@ -24,18 +24,12 @@ class ExecuteCommand : public WebDriverCommand {
                  const DictionaryValue* const parameters);
   virtual ~ExecuteCommand();
 
-  virtual bool Init(Response* const response);
-
   virtual bool DoesPost();
   virtual void ExecutePost(Response* const response);
 
  private:
   virtual bool RequiresValidTab();
 
-  std::string script_;
-  bool has_args_;
-  std::string args_;
-
   DISALLOW_COPY_AND_ASSIGN(ExecuteCommand);
 };