Manifest - input_components

An optional Manifest key enabling the use of the input.ime API (Input Method Editor) for use with ChromeOS. This allows your extension to handle keystrokes, set the composition, and open assistive windows. Developers must also declare the "input" permission in the extension's "permissions" array. The key accepts an array of objects: name, id, language, layouts, input_view, and options_page (Refer to the table below).

Property	Type	Description
name	string	Required name of the input component object.
id	string	Optional component object id.
language	string (or array of strings)	Optional specified language or list of applicable languages. Examples: "en", ["en", "pt"]
layouts	string (or array of strings)	Optional list of input methods. Note that ChromeOS only supports one layout per input method. If multiple layouts are specified, selection order is undefined. Extensions are therefore strongly encouraged to only specify one layout per input method. For keyboard layouts, a xkb: prefix indicates that this is a keyboard layout extension.
Example: ["us::eng"]
input_view	string	Optional string specifying an extension resource.
options_page	string	Optional string specifying an extension resource. If not provided, the default extension's options page will be used.

{
  // ...
   "input_components": [{
     "name": "ToUpperIME",
    "id": "ToUpperIME",
    "language": "en",
    "layouts": ["us::eng"]
  }]
  // ...
}