Add experimental extension APIs to notify about wakeup and screen unlock

chrome/common/extensions/api/extension_api.json

 [
   {
     "namespace": "extension",
     "types": [
       {
         "id": "MessageSender",
         "type": "object",
         "description": "An object containing information about the script context that sent a message or request.",
         "properties": {
           "tab": {"$ref": "Tab", "optional": true, "description":"This property will <b>only</b> be present when the connection was opened from a tab or content script."},
@@ skipping 491 matching lines @@
         "name": "onVolumeChanged",
         "type": "function",
         "description": "Fired when the volume is changed.",
         "parameters": [
           {
             "$ref": "AccessibilityVolumeInfo",
             "name": "volume",
             "description": "Information about the current state of the system volume control, including whether it is muted."
           }
         ]
+      },
+      {
+        "name": "onScreenUnlocked",
+        "type": "function",
+        "description": "Fired when the screen is unlocked.",
+        "parameters": []
+      },
+      {
+        "name": "onWokeUp",
+        "type": "function",
+        "description": "Fired when the device wakes up from sleep.",
+        "parameters": []
       }
     ]
   },
   {
     "namespace": "experimental.speechInput",
     "types": [
       {
         "id": "SpeechInputStartOptions",
         "type": "object",
         "description": "Object describing the options used for speech recognition.",
@@ skipping 8718 matching lines @@
                   }
                 }
               }
             ]
           }
         ]
       }
     ]
   }
 ]