Applescript: how to script keystrokes?

Question

Hello, I am trying to use Applescript to 'clear browsing data' in Chrome.  I'm trying to emulate clicking command-shift-delete to bring up the frame showing the browser clearing options, and then tab-return to click the button. When manually using these keystrokes it works perfetly.  However, I copied some script from this forum and modified it as follows, and can't get it to work:
tell application "Google Chrome" to activate
tell application "System Events"
   key code 13 using {command down, option down}
   delay 0.55
   key code 45 using {command down}
   delay 0.55
end tell
tell application "Google Chrome"
   tell first window
       set bounds to {0, 0, 1280, 800}
   end tell
end tell
tell application "System Events"
   key code 51 using {command down, shift down}
   key code 48
   key code 76
end tell
I also tried substituting "keystroke tab" and "keystroke return" for the last 2 key codes above.  Any help with this will be greatly appreciated.

Answer 1

I don't really know what the first part of your script is intended to do, but focusing on the issue you describe, I think you just need a delay to allow the frame to be displayed:
tell application "Google Chrome" to activate
tell application "System Events"
  key code 51 using {command down, shift down}
  delay 1
  key code 48
  key code 76
end tell