Remove unused references to system.powerSource.
@@ -7141,60 +7141,6 @@ chrome.system.network.NetworkInterface.prototype.address;
/** @const {number} The prefix length */
chrome.system.network.NetworkInterface.prototype.prefixLength;
-/**
- * @const
- * @see https://developer.chrome.com/apps/system_powerSource
- */
-chrome.system.powerSource = {};
-
-/**
- * @enum {string}
- */
-chrome.system.powerSource.PowerSourceType = {
- UNKNOWN: '',
- MAINS: '',
- USB: '',
-};
-
-/**
- * PowerSourceInfo
- * @constructor
- */
-chrome.system.powerSource.PowerSourceInfo = function() {};
-
-/** @type {!chrome.system.powerSource.PowerSourceType} */
-chrome.system.powerSource.PowerSourceInfo.prototype.type;
-
-/** @type {number|undefined} */
-chrome.system.powerSource.PowerSourceInfo.prototype.maxPower;
-
-/** @type {boolean} */
-chrome.system.powerSource.PowerSourceInfo.prototype.active;
-
-/**
- * Requests information on attached power sources.
- *
- * @param {function(!Array<!chrome.system.powerSource.PowerSourceType>):void}
- * callback The callback to invoke with the results or undefined if the
- * power source information is not known.
- */
-chrome.system.powerSource.getPowerSourceInfo = function(callback) {};
-
-/**
- * Requests a power source status update. Resulting power source
- * status updates are observable using onPowerChanged.
- */
-chrome.system.powerSource.requestStatusUpdate = function() {};
-
-/**
- * Event for changes in the set of connected power sources.
- *
- * It takes an additional, optional `extraInfoSpec` argument, which we ignore.
- * @type {!ChromeBaseEvent<function(string,
- * !chrome.system.powerSource.PowerSourceInfo): (boolean|undefined)>}
- */
-chrome.system.powerSource.onPowerChanged;
-
/**
* @const
