Resize Google Chrome

using terms from application "Google Chrome"
	tell application "Google Chrome"
		activate
		
		display dialog "Please select a size." buttons {"640 x 480", "800 x 600", "1024 x 768"} with icon note
		
		set button_pressed to the button returned of the result
		
		if button_pressed is "640 x 480" then
			set x_size to 640
			set y_size to 480
			
		else if button_pressed is "800 x 600" then
			set x_size to 800
			set y_size to 600
			
		else if button_pressed is "1024 x 768" then
			set x_size to 1024
			set y_size to 768
			
		end if
		
		tell front window
			set OrigBounds to bounds
			set bounds to {(item 1 of OrigBounds), (item 2 of OrigBounds), (item 1 of OrigBounds) + x_size, (item 2 of OrigBounds) + y_size}
		end tell
		
	end tell
end using terms from