Rename getTabContentses to getExtensionTabs.

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 100 matching lines @@
         "parameters": [
           {"type": "integer", "name": "windowId", "optional": true}
         ],
         "returns": {
           "type": "array",
           "description": "Array of global objects",
           "items": { "type": "object" }
         }
       },
       {
-        "name": "getTabContentses",
+        "name": "getExtensionTabs",
         "type": "function",
         "description": "Returns an array of the global JavaScript objects for each of the tab contents views running inside the current extension. If windowId is specified, returns only the tab contentses attached to the specified window.",
         "parameters": [
           {"type": "integer", "name": "windowId", "optional": true}
         ],
         "returns": {
           "type": "array",
           "description": "Array of global objects",
           "items": { "type": "object" }
         }
@@ skipping 1332 matching lines @@
         "type": "function",
         "description": "Logs a message during internal unit testing.",
         "parameters": [
           {"type": "string", "name": "message"}
         ]
       }
     ],
     "events": []
   }
 ]