[COPY] - Implemented API for tracking ongoing file transfers from file manager.

chrome/common/extensions/api/fileBrowserPrivate.json

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 [
   {
     "namespace":"fileBrowserPrivate",
     "nodoc": "true",
     "types": [
       {
@@ skipping 241 matching lines @@
             "description": "Path that sourcePath was mounted to."
           },
           "mountType": {
             "type": "string",
             "enum": ["device", "file", "network", "gdata"],
             "description": "Type of the mount."
           }
         }
       },
       {
+        "id": "FileTransferStatus",
+        "type": "object",
+        "description": "Payload data for file transfer status updates.",
+        "properties": {
+          "fileUrl": {
+            "type": "string",
+            "description": "URL of file that is being transfered."
+          },
+          "transferState": {
+            "type": "string",
+            "enum": ["started", "in_progress", "completed", "failed"],
+            "description": "File transfer progress state."
+          },
+          "transferType": {
+            "type": "string",
+            "enum": ["upload", "download"],
+            "description": "Defines file transfer direction."
+          },
+          "processed": {
+            "type": "integer",
+            "optional": true,
+            "description": "Completed portion of the transfer operation."
+          },
+          "total": {
+            "type": "integer",
+            "optional": true,
+            "description": "Total size (cost) of transfer operation."
+          }
+        }
+      },
+      {
         "id": "FileWatchEvent",
         "type": "object",
         "description": "Payload data for disk mount / unmount event.",
         "properties": {
           "eventType": {
             "type": "string",
             "enum": ["changed", "error"],
             "description": "Specifies type of event that is raised."
           },
           "fileUrl": {
@@ skipping 373 matching lines @@
                 "name" : "mountPoints",
                 "type": "array",
                 "items": {"$ref": "MountPointInfo"},
                 "description": "The list of MountPointInfo representing mounted devices."
               }
             ]
           }
         ]
       },
       {
+        "name": "getFileTransfers",
+        "description": "Get the list of ongoing file transfer operations.",
+        "parameters": [
+          {
+            "name": "callback",
+            "type": "function",
+            "parameters": [
+              {
+                "name" : "fileTransfers",
+                "type": "array",
+                "items": {"$ref": "FileTransferStatus"},
+                "description": "The list of FileTransferStatus representing ongoing file transfers."
+              }
+            ]
+          }
+        ]
+      },
+      {
         "name": "getSizeStats",
         "description": "Retrieves total and remaining size of a mount point.",
         "parameters": [
           {
             "name": "mountPath",
             "type": "string",
             "description": "Mount point path."
           },
           {
             "name": "callback",
@@ skipping 61 matching lines @@
         "description": "Fired when mount event is detected.",
         "parameters": [
           {
             "$ref": "MountCompletedEvent",
             "name": "event",
             "description": "MountCompleted event information."
           }
         ]
       },
       {
+        "name": "onFileTransfersUpdated",
+        "type": "function",
+        "description": "Fired when file transfers with remote file system are in progress.",
+        "parameters": [
+          {
+            "type": "array",
+            "items": {"$ref": "FileTransferStatus"},
+            "name": "event",
+            "description": "List of ongoing file statuses for ongoing transfer operations."
+          }
+        ]
+      },
+      {
         "name": "onFileChanged",
         "type": "function",
         "description": "Fired when watched file change event is detected.",
         "parameters": [
           {
             "$ref": "FileWatchEvent",
             "name": "event",
             "description": "File watch event information."
           }
         ]
       }
     ]
   }
 ]