The command handler for /session/:sessionId/execute (execute_script) was...

chrome/test/webdriver/commands/execute_command.h

Index: chrome/test/webdriver/commands/execute_command.h
===================================================================
--- chrome/test/webdriver/commands/execute_command.h	(revision 75333)
+++ chrome/test/webdriver/commands/execute_command.h	(working copy)
@@ -24,18 +24,12 @@
                  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);
 };