This adds some GData private API to the file manager

chrome/common/extensions/api/fileBrowserPrivate.json

 [
   {
     "namespace":"fileBrowserPrivate",
     "nodoc": "true",
     "types": [
       {
         "id": "FileBrowserTask",
         "type": "object",
         "description": "Represents information about available browser tasks. A task is an abstraction of an operation that the file browser can perform over a selected file set.",
         "properties": {
@@ skipping 33 matching lines @@
             "type": "boolean",
             "description": "Flag that specifies if volume is mounted in read-only mode."
           },
           "totalSizeKB": {
             "type": "integer",
             "description": "Total disk volume size in KBs"
           }
         }
       },
       {
+        "id": "GDataFileProperties",
+        "type": "object",
+        "description": "GData file properties.",
+        "properties": {
+          "thumbnailUrl": {
+            "type": "string",
+            "optional": true,
+            "description": "URL to the GData thumbnail image for this file."
+          },
+          "isPinned": {
+            "type": "boolean",
+            "optional": true,
+            "description": "True if the file is pinned in GData cache."
+          },
+          "isPresent": {
+            "type": "boolean",
+            "optional": true,
+            "description": "True if the file is present in GData cache."
+          },
+          "isDirty": {
+            "type": "boolean",
+            "optional": true,
+            "description": "True if the file is awaiting upload in GData cache."
+          },
+          "errorCode": {
+            "type": "integer",
+            "optional": true,
+            "description": "The error code (from base::PlatformFileError) if fetching the properties for this file had an error."
+          }
+        }
+      },      
+      {
         "id": "MountPointInfo",
         "type": "object",
         "description": "Mounted point information.",
         "properties": {
           "mountPath": {
             "type": "string",
             "optional": true,
             "description": "Disk volume mount point path. The value corresponds to its Entry.fullPath in File API."
           },
           "sourceUrl": {
@@ skipping 108 matching lines @@
             "enum": ["mount", "unmount"],
             "description": "Is the event raised for mounting or unmounting."
           },
           "status": {
             "type": "string",
             "enum": ["success", "error_unknown", "error_internal",
                      "error_unknown_filesystem", "error_unsuported_filesystem",
                      "error_invalid_archive", "error_libcros_missing",
                      "error_authentication", "error_network",
                      "error_path_unmounted"],
-            "description": "Event type that tells listeners if mount was successfull or an error occurred. It also specifies the error."
+            "description": "Event type that tells listeners if mount was successful or an error occurred. It also specifies the error."
           },
           "sourceUrl": {
             "type": "string",
             "description": "Path that has been mounted."
           },
           "mountPath": {
             "type": "string",
             "optional": true,
             "description": "Path that sourcePath was mounted to."
           },
@@ skipping 227 matching lines @@
               {
                 "name" : "success",
                 "type": "boolean",
                 "description": "True if the selected files can be viewed by the browser."
               }
             ]
           }
         ]
       },
       {
+        "name": "getGDataFileProperties",
+        "description": "Requests GData file properties for a list of files",
+        "parameters": [
+          {
+            "name": "fileUrls",
+            "type": "array",
+            "description": "Array of file URLs to fetch properties for."
+          },
+          {
+            "name": "callback",
+            "type": "function",
+            "optional": "false",
+            "parameters": [
+              {
+                "name" : "fileProperties",
+                "type": "array",
+                "items": {"$ref": "GDataFileProperties"},
+                "description": "An array of the requested file properties, one entry for each file in fileUrls."
+              }
+            ]
+          }
+        ]
+      },      
+      {
         "name": "getVolumeMetadata",
         "description": "Requests volume's metadata",
         "parameters": [
           {
             "name": "mountUrl",
             "type": "string",
             "description": "Mount url of the volume."
           },
           {
             "name": "callback",
@@ skipping 131 matching lines @@
           {
             "$ref": "FileWatchEvent",
             "name": "event",
             "description": "File watch event information."
           }
         ]
       }
     ]
   }
 ]