windows.create({url:}) now supports relative paths. tabs.update()/tabs.move() now return Tab.

chrome/common/extensions/api/extension_api.json

 [
   {
     "namespace": "extension",
     "types": [
       {
         "id": "Port",
         "type": "object",
         "description": "An object which allows two way communication with other pages.",
         "properties": {
           "name": {"type": "string"},
@@ skipping 457 matching lines @@
         "parameters": [
           {"type": "integer", "name": "tabId", "minimum": 0},
           {
             "type": "object",
             "name": "updateProperties",
             "properties": {
               "url": {"type": "string", "optional": true},
               "selected": {"type": "boolean", "optional": true}
             }
           },
-          {"type": "function", "name": "callback", "optional": true, "parameters": []}
+          {
+            "type": "function",
+            "name": "callback",
+            "optional": true,
+            "parameters": [
+              {
+                "name": "tab",
+                "$ref": "Tab",
+                "description": "Details about the updated tab."
+              }
+            ]
+          }
         ]
       },
       {
         "name": "move",
         "type": "function",
         "description": "Move a tab to a new position within its window, or to a new window.",
         "parameters": [
           {"type": "integer", "name": "tabId", "minimum": 0},
           {
             "type": "object",
             "name": "moveProperties",
             "properties": {
               "windowId": {
                 "type": "integer",
                 "minimum": 0,
                 "optional": true,
                 "description": "Defaults to the window the tab is currently in."
               },
               "index": {
                 "type": "integer",
                 "minimum": 0,
                 "description": "The position to move the window to. The provided value will be clamped to between zero and the number of tabs in the window."
               }
             }
           },
-          {"type": "function", "name": "callback", "optional": true, "parameters": []}
+          {
+            "type": "function",
+            "name": "callback",
+            "optional": true,
+            "parameters": [
+              {
+                "name": "tab",
+                "$ref": "Tab",
+                "description": "Details about the moved tab."
+              }
+            ]
+          }
         ]
       },
       {
         "name": "remove",
         "type": "function",
         "description": "Closes a tab.",
         "parameters": [
           {"type": "integer", "name": "tabId", "minimum": 0},
           {"type": "function", "name": "callback", "optional": true, "parameters": []}
         ]
@@ skipping 573 matching lines @@
         "type": "function",
         "description": "Logs a message during internal unit testing.",
         "parameters": [
           {"type": "string", "name": "message"}
         ]
       }
     ],
     "events": []
   }
 ]