Add stub functions for chrome.* APIs in 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": {"$ref": "Tab", "optional": true, "description":"This property will <b>only</b> be present when the connection was opened from a tab or content script."},
           "id": {"type": "string", "description": "The extension ID of the extension that opened the connection."}
         }
       },
@@ skipping 21 matching lines @@
         "description": "Set for the lifetime of a callback if an ansychronous extension api has resulted in an error. If no error has occured lastError will be <var>undefined</var>.",
         "properties": {
           "message": { "type": "string", "description": "Description of the error that has taken place." }
         }
       }
     },
     "functions": [
       {
         "name": "connect",
         "type": "function",
+        "unprivileged": true,
         "description": "Attempts to connect to other listeners within the extension (listeners may be toolstrips or the extension's background page). This is primarily useful for content scripts connecting to their extension processes. Extensions may connect to content scripts embedded in tabs via <a href='broken'><var>chrome.tabs.connectToTab</var></a>.",
         "parameters": [
           {"type": "string", "name": "extensionId", "optional": true, "description": "The extension ID of the extension you want to connect to. If omitted, default is your own extension."},
           {
             "type": "object",
             "name": "connectInfo",
             "properties": {
               "name": { "type": "string", "optional": true, "description": "Will be passed into onConnect for extension processes that are listening for the connection event." }
             },
             "optional": true
           }
         ],
         "returns": {
           "$ref": "Port",
           "description": "Port through which messages can be sent and received with the extension."
         }
       },
       {
         "name": "sendRequest",
         "type": "function",
+        "unprivileged": true,
         "description": "Sends a single request to other listeners within the extension. Similar to chrome.extension.connect, but only sends a single request with an optional response.",
         "parameters": [
           {"type": "string", "name": "extensionId", "optional": true, "description": "The extension ID of the extension you want to connect to. If omitted, default is your own extension."},
           { "type": "any", "name": "request" },
           {
             "type": "function",
             "name": "responseCallback",
             "optional": true,
             "parameters": [
               {
                 "name": "response",
                 "type": "any",
                 "description": "The JSON response object sent by the handler of the request."
               }
             ]
           }
         ]
       },
       {
         "name": "getURL",
         "type": "function",
+        "unprivileged": true,
         "description": "Convert a relative path within an extension install directory to a fully-qualified URL.",
         "parameters": [
           {
             "type": "string",
             "name": "path",
             "description": "A path to a resource within an extension expressed relative to it's install directory."
           }
         ],
         "returns": {
           "type": "string",
@@ skipping 44 matching lines @@
           "type": "array",
           "description": "Array of global objects",
           "items": { "type": "object" }
         }
       }
     ],
     "events": [
       {
         "name": "onConnect",
         "type": "function",
+        "unprivileged": true,
         "description": "Fired when a connection is made from either an extension process or a content script.",
         "parameters": [
           {"$ref": "Port", "name": "port"}
         ]
       },
       {
         "name": "onConnectExternal",
         "type": "function",
         "description": "Fired when a connection is made from another extension.",
         "parameters": [
           {"$ref": "Port", "name": "port"}
         ]
       },
       {
         "name": "onRequest",
         "type": "function",
+        "unprivileged": true,
         "description": "Fired when a request is sent from either an extension process or a content script.",
         "parameters": [
           {"name": "request", "type": "any", "description": "The request sent by the calling script."},
           {"name": "sender", "$ref": "MessageSender" },
           {"name": "sendResponse", "type": "function", "description": "Function to call when you have a response. The argument should be any JSON-ifiable object, or undefined if there is no response." }
         ]
       },
       {
         "name": "onRequestExternal",
         "type": "function",
@@ skipping 1542 matching lines @@
         "type": "function",
         "description": "Logs a message during internal unit testing.",
         "parameters": [
           {"type": "string", "name": "message"}
         ]
       }
     ],
     "events": []
   }
 ]