Adds socket.getInfo to the socket API

chrome/common/extensions/docs/samples.json

 {
   "api": {
     "chrome.alarms.clear": "alarms.html#method-clear",
     "chrome.alarms.clearAll": "alarms.html#method-clearAll",
     "chrome.alarms.create": "alarms.html#method-create",
     "chrome.alarms.get": "alarms.html#method-get",
     "chrome.alarms.getAll": "alarms.html#method-getAll",
     "chrome.alarms.onAlarm": "alarms.html#event-onAlarm",
     "chrome.app.window.create": "app.window.html#method-create",
     "chrome.app.window.focus": "app.window.html#method-focus",
@@ skipping 171 matching lines @@
     "chrome.experimental.serial.getPorts": "experimental.serial.html#method-getPorts",
     "chrome.experimental.serial.open": "experimental.serial.html#method-open",
     "chrome.experimental.serial.read": "experimental.serial.html#method-read",
     "chrome.experimental.serial.setControlSignals": "experimental.serial.html#method-setControlSignals",
     "chrome.experimental.serial.write": "experimental.serial.html#method-write",
     "chrome.experimental.socket.bind": "experimental.socket.html#method-bind",
     "chrome.experimental.socket.connect": "experimental.socket.html#method-connect",
     "chrome.experimental.socket.create": "experimental.socket.html#method-create",
     "chrome.experimental.socket.destroy": "experimental.socket.html#method-destroy",
     "chrome.experimental.socket.disconnect": "experimental.socket.html#method-disconnect",
+    "chrome.experimental.socket.getInfo": "experimental.socket.html#method-getInfo",
     "chrome.experimental.socket.read": "experimental.socket.html#method-read",
     "chrome.experimental.socket.recvFrom": "experimental.socket.html#method-recvFrom",
     "chrome.experimental.socket.sendTo": "experimental.socket.html#method-sendTo",
     "chrome.experimental.socket.setKeepAlive": "experimental.socket.html#method-setKeepAlive",
     "chrome.experimental.socket.setNoDelay": "experimental.socket.html#method-setNoDelay",
     "chrome.experimental.socket.write": "experimental.socket.html#method-write",
     "chrome.experimental.speechInput.isRecording": "experimental.speechInput.html#method-isRecording",
     "chrome.experimental.speechInput.onError": "experimental.speechInput.html#event-onError",
     "chrome.experimental.speechInput.onResult": "experimental.speechInput.html#event-onResult",
     "chrome.experimental.speechInput.onSoundEnd": "experimental.speechInput.html#event-onSoundEnd",
@@ skipping 2584 matching lines @@
         "manifest.json",
         "popup.html",
         "popup.js",
         "sample.css"
       ],
       "source_hash": "8e51dc3a9577065d22ce92f3c838edc5ceaf4e65",
       "zip_path": "examples/api/extension/isAllowedAccess.zip"
     }
   ]
 }