Need to automate copy / paste graphic selection from Preview to Google Doc
The following is working for me in OS X 10.9:

In ~/bin/preview2chrome.scpt,

tell application "Preview" to activate
tell application "System Events"
    tell process "Preview"
        keystroke "c" using command down
    end tell
end tell
delay 0.5

tell application "Google Chrome" to activate
tell application "System Events"
    tell process "Chrome"
        keystroke "v" using command down
        keystroke return
        keystroke return
    end tell
end tell

delay 0.5
tell application "Preview" to activate


In ~/Library/Services, a Run Shell Script service named Preview2Chrome.workflow containing:

/usr/bin/osascript /Users/mellis/bin/preview2chrome.scpt


Option-V assigned as a shortcut key for Preview2Chrome.workflow .

This solution requires manually opening the destination Google Doc and making it the active tab in an active Chrome window with all other Chrome windows minimized. That's not much of a restriction for my purposes, but it would be nice to have an solution that knows how to paste to the destination doc no matter what tabs and windows are active.