Enable extension APIs for content scripts.

chrome/common/extensions/api/extension_api.json

 [
   {
     "namespace": "extension",
-    "unprivileged": true,
     "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."},
           "id": {"type": "string", "description": "The extension ID of the extension that opened the connection."}
         }
       },
@@ skipping 1005 matching lines @@
             "type": "any",
             "description": "The new value of the setting.",
             "optional": true
           }
         }
       }
     ],
     "functions": [
       {
         "name": "get",
+        "unprivileged": true,
         "type": "function",
         "description": "Gets one or more values from settings.",
         "parameters": [
           {
             "name": "keys",
             "choices": [
               { "type": "string" },
               { "type": "array", "items": { "type": "string" } },
               {
                 "type": "object",
@@ skipping 16 matching lines @@
                 "properties": {},
                 "additionalProperties": { "type": "any" },
                 "description": "Object with given keys set to settings values."
               }
             ]
           }
         ]
       },
       {
         "name": "set",
+        "unprivileged": true,
         "type": "function",
         "description": "Sets multiple settings values.",
         "parameters": [
           {
             "name": "settings",
             "type": "object",
             "properties": {},
             "additionalProperties": { "type": "any" },
             "description": "Object to augment settings with. Values that cannot be serialized (functions, etc) will be ignored."
           },
           {
             "name": "callback",
             "type": "function",
             "description": "Callback on success, or on failure (in which case lastError will be set).",
             "parameters": [],
             "optional": true
           }
         ]
       },
       {
         "name": "remove",
+        "unprivileged": true,
         "type": "function",
         "description": "Removes one or more values from settings.",
         "parameters": [
           {
             "name": "keys",
             "choices": [
               {"type": "string"},
               {"type": "array", "items": {"type": "string"}, "minItems": 1}
             ],
             "description": "A single key or a list of keys to remove from settings."
           },
           {
             "name": "callback",
             "type": "function",
             "description": "Callback on success, or on failure (in which case lastError will be set).",
             "parameters": [],
             "optional": true
           }
         ]
       },
       {
         "name": "clear",
+        "unprivileged": true,
         "type": "function",
         "description": "Removes all values from settings.",
         "parameters": [
           {
             "name": "callback",
             "type": "function",
             "description": "Callback on success, or on failure (in which case lastError will be set).",
             "parameters": [],
             "optional": true
           }
         ]
       }
     ],
     "events": [
       {
         "name": "onChanged",
+        "unprivileged": true,
         "type": "function",
         "description": "Fired when one or more settings change.",
         "parameters": [
           {
             "name": "changes",
             "type": "array",
             "items": {"$ref": "SettingChange"}
           }
         ]
       }
@@ skipping 241 matching lines @@
             "optional": true,
             "description": "List of origin permissions."
           }
         }
       }
     ],
     "events": [
       {
         "name": "onAdded",
         "type": "function",
-        "unprivileged": true,
         "description": "Fired when the extension acquires new permissions.",
         "parameters": [
           {
             "$ref": "Permissions",
             "name": "permissions",
             "description": "The newly acquired permissions."
           }
         ]
       },
       {
         "name": "onRemoved",
         "type": "function",
-        "unprivileged": true,
         "description": "Fired when access to permissions has been removed from the extension.",
         "parameters": [
           {
             "$ref": "Permissions",
             "name": "permissions",
             "description": "The permissions that have been removed."
           }
         ]
       }
      ],
     "functions": [
       {
         "name": "getAll",
         "type": "function",
-        "unprivileged": true,
         "description": "Gets the extension's current set of permissions.",
         "parameters": [
           {
             "name": "callback",
             "type": "function",
             "parameters": [
                {
                 "name": "permissions",
                 "$ref": "Permissions",
                 "description": "The extension's active permissions."
               }
             ]
           }
         ]
       },
       {
         "name": "contains",
         "type": "function",
-        "unprivileged": true,
         "description": "Checks if the extension has the specified permissions.",
         "parameters": [
           {
             "name": "permissions",
             "$ref": "Permissions"
           },
           {
             "name": "callback",
             "type": "function",
             "parameters": [
               {
                 "name": "result",
                 "type": "boolean",
                 "description": "True if the extension has the specified permissions."
               }
             ]
           }
         ]
       },
       {
         "name": "request",
         "type": "function",
-        "unprivileged": true,
         "description": "Requests access to the specified permissions. These permissions must be defined in the optional_permissions field of the manifest. If there are any problems requesting the permissions, <a href='extension.html#property-lastError'>chrome.extension.lastError</a> will be set.",
         "parameters": [
           {
             "name": "permissions",
             "$ref": "Permissions"
           },
           {
             "name": "callback",
             "type": "function",
             "optional": true,
             "parameters": [
               {
                 "name": "granted",
                 "type": "boolean",
                 "description": "True if the user granted the specified permissions."
               }
             ]
           }
         ]
       },
       {
         "name": "remove",
         "type": "function",
-        "unprivileged": true,
         "description": "Removes access to the specified permissions. If there are any problems removing the permissions, <a href='extension.html#property-lastError'>chrome.extension.lastError</a> will be set.",
         "parameters": [
           {
             "name": "permissions",
             "$ref": "Permissions"
           },
           {
             "name": "callback",
             "type": "function",
             "optional": true,
@@ skipping 1637 matching lines @@
             "name": "newState",
             "type": "string",
             "enum": ["active"]
           }
         ]
       }
     ]
   },
   {
     "namespace": "i18n",
-    "unprivileged": true,
     "types": [],
     "functions": [
       {
         "name": "getAcceptLanguages",
         "type": "function",
         "description": "Gets the accept-languages of the browser. This is different from the locale used by the browser; to get the locale, use <code>window.navigator.language</code>.",
         "parameters": [
           {
             "type": "function",
             "name": "callback",
@@ skipping 1111 matching lines @@
       }
     ]
   },
   {
     "namespace": "experimental.downloads",
     "nodoc": "true",
     "events": [
       {
         "name": "onCreated",
         "type": "function",
-        "unprivileged": true,
         "description": "This event fires with the DownloadItem object when a download begins.",
         "parameters": [
           {"$ref": "DownloadItem"}
         ]
       },
       {
         "name": "onChanged",
         "type": "function",
-        "unprivileged": true,
         "description": "When any of a DownloadItem's properties except |bytesReceived| changes, this event fires with the download id and an object containing the properties that changed.",
         "parameters": [
           {"$ref": "DownloadDelta"}
         ]
       },
       {
         "name": "onErased",
         "type": "function",
-        "unprivileged": true,
         "description": "Fires with the download id when a download is erased from history.",
         "parameters": [
           {"type": "integer", "name": "downloadId"}
         ]
       }
     ],
     "properties": {
       "STATE_IN_PROGRESS": {
         "type": "string",
         "value": "in_progress",
@@ skipping 947 matching lines @@
         "type": "function",
         "description": "Records an elapsed time of no more than 1 hour.  The sample value is specified in milliseconds.",
         "parameters": [
           {"name": "metricName", "type": "string"},
           {"name": "value", "type": "integer"}
         ]
       },
       {
         "name": "recordValue",
         "type": "function",
-        "unprivileged": true,
         "description": "Adds a value to the given metric.",
         "parameters": [
           {"name": "metric", "$ref": "MetricType"},
           {"name": "value", "type": "integer"}
         ]
       }
     ],
     "events": []
   },
   {
@@ skipping 1071 matching lines @@
                     }
                   }
                 }
               }
             ]
           }
         ]
       },
       {
         "name": "notifyFail",
+        "unprivileged": true,
         "type": "function",
         "description": "Notifies the browser process that test code running in the extension failed.  This is only used for internal unit testing.",
         "parameters": [
           {"type": "string", "name": "message"}
         ]
       },
       {
         "name": "notifyPass",
+        "unprivileged": true,
         "type": "function",
         "description": "Notifies the browser process that test code running in the extension passed.  This is only used for internal unit testing.",
         "parameters": [
           {"type": "string", "name": "message", "optional": true}
         ]
       },
       {
         "name": "resetQuota",
         "type": "function",
         "description": "Resets all accumulated quota state for all extensions.  This is only used for internal unit testing.",
@@ skipping 355 matching lines @@
                 "description": "The sidebar's title. It is displayed in a tooltip over the sidebar's mini tab."
               }
             }
           }
         ]
       }
     ],
     "events": [
       {
         "name": "onStateChanged",
-        "unprivileged": true,
         "type": "function",
         "description": "Notifies about sidebar state changes.",
         "parameters": [
           {
             "type": "object",
             "name": "details",
             "properties": {
               "tabId": {
                 "type": "integer",
                 "minimum": 0
@@ skipping 2472 matching lines @@
                   }
                 }
               }
             ]
           }
         ]
       }
     ]
   }
 ]