Add parsers for Drive v2 Change/ChangeList/Parents

chrome/test/data/chromeos/drive/filelist.json

Index: chrome/test/data/chromeos/drive/filelist.json
diff --git a/chrome/test/data/chromeos/drive/filelist.json b/chrome/test/data/chromeos/drive/filelist.json
index f6d2fd88287605534a919bd4508c0742a555f1ff..1cb5897c98db850fd9b4894e34efa1cc5cc7445d 100644
--- a/chrome/test/data/chromeos/drive/filelist.json
+++ b/chrome/test/data/chromeos/drive/filelist.json
@@ -75,15 +75,6 @@
    "modifiedDate": "2012-07-27T04:54:11.030Z",
    "modifiedByMeDate": "2012-07-27T04:54:11.030Z",
    "lastViewedByMeDate": "2012-07-27T04:54:11.030Z",
-   "parents": [
-    {
-     "kind": "drive#parentReference",
-     "id": "0AIv7G8yEYAWHUk9ABC",
-     "selfLink": "https://www.googleapis.com/drive/v2/files/1Pc8jzfU1ErbN_eucMMqdqzY3eBm0v8sxXm_1CtLxABC/parents/0AIv7G8yEYAWHUk9ABC",
-     "parentLink": "https://www.googleapis.com/drive/v2/files/0AIv7G8yEYAWHUk9ABC",
-     "isRoot": true
-    }
-   ],

[kochi, 2012/08/02 09:16:15]

Some file may not contain parents field.
In that case we assume the file is under the root directory.

[satorux1, 2012/08/02 16:41:51]

Please add some comment on this in the patch description.

[kochi, 2012/08/02 17:16:47]

Done.

    "exportLinks": {
     "application/msword": "https://docs.google.com/feeds/download/documents/export/Export?id=1Pc8jzfU1ErbN_eucMMqdqzY3eBm0v8sxXm_1CtLxABC&exportFormat=doc",
     "text/html": "https://docs.google.com/feeds/download/documents/export/Export?id=1Pc8jzfU1ErbN_eucMMqdqzY3eBm0v8sxXm_1CtLxABC&exportFormat=html",