Changing the default keyboard shortcuts in iTerm2

To make a single hotkey always create a new Chrome window, launch Automator. Tell it to create a new Service Have the service take no input. Assign a single action to the service: Run AppleScript (in the Utilities list of actions).

Here is the AppleScript:

on run {input, parameters}
    tell application "Google Chrome"
        activate
        delay 0.1
        make new window
    end tell
    return input
end run

Save the service with a name like "New Chrome Window". Then, in System Preferences assign an unused keyboard shortcut to the service. You can then create a new Chrome window no matter what application you are in.

To improve the service substantially, replace "Google Chrome" with "Safari". :-)

To create a new window in a different scriptable app, replace "Google Chrome" with the name of the app you want to create a new window.

Sorry but what you want is not possible.

You could try adding the XCode keybindings that do this

"^\UF702" = "moveSubWordBackward:";                     /* Ctl-Left Arrow */
"^$\UF702" = "moveSubWordBackwardAndModifySelection:";  /* Ctl-Shift-Left Arrow */
"^\UF703" = "moveSubWordForward:";                      /* Ctl-Right Arrow */
"^$\UF703" = "moveSubWordForwardAndModifySelection:";   /* Ctl-Shift-Right Arrow */
"^\177" = "deleteSubWordBackward:";                     /* ctl-delete */
"^\UF728" = "deleteSubWordForward:";                    /* ctl-forwardDelete */

into your ~/Library/KeyBindings/DefaultKeyBindings.dict file but unless the application is written to respond to these methods, it won't work. As you've said, these methods are not part of the standard Text System so these calls in an app will just go unanswered or you will get a system beep.