Make onFileTransferUpdated single value from list.

* SendDriveFileTransferEvent and onFileTransfersUpdated are not
  necessay to recieve list because this event is always single.

BUG=408482
TEST=manually
1. Copy the local file to drive.
2. Confirm sync status is updated correctly.

Review URL: https://codereview.chromium.org/542573002

Cr-Commit-Position: refs/heads/master@{#293619}

chrome/browser/chromeos/extensions/file_manager/event_router.cc

@@ -671,25 +671,18 @@ void EventRouter::SendDriveFileTransferEvent() {
   if (!drive_job_info_for_scheduled_event_)
     return;
 
-  // Convert the drive_job_info_for_scheduled_event_ to IDL type.
-  std::vector<linked_ptr<file_browser_private::FileTransferStatus> >
-      status_list;
-
-  linked_ptr<file_browser_private::FileTransferStatus> status(
-      new file_browser_private::FileTransferStatus());
+  file_browser_private::FileTransferStatus status;
   JobInfoToTransferStatus(profile_,
                           kFileManagerAppId,
                           drive_job_info_for_scheduled_event_->status,
                           drive_job_info_for_scheduled_event_->job_info,
-                          status.get());
-  status_list.push_back(status);
+                          &status);
 
   drive_job_info_for_scheduled_event_.reset();
 
-  BroadcastEvent(
-      profile_,
-      file_browser_private::OnFileTransfersUpdated::kEventName,
-      file_browser_private::OnFileTransfersUpdated::Create(status_list));
+  BroadcastEvent(profile_,
+                 file_browser_private::OnFileTransfersUpdated::kEventName,
+                 file_browser_private::OnFileTransfersUpdated::Create(status));
 }
 
 void EventRouter::OnDirectoryChanged(const base::FilePath& drive_path) {

chrome/common/extensions/api/file_browser_private.idl

@@ -808,7 +808,7 @@ interface Functions {
 interface Events {
   static void onMountCompleted(MountCompletedEvent event);
 
-  static void onFileTransfersUpdated(FileTransferStatus[] event);
+  static void onFileTransfersUpdated(FileTransferStatus event);
 
   static void onCopyProgress(long copyId, CopyProgressStatus status);
 

ui/file_manager/file_manager/background/js/drive_sync_handler.js

@@ -84,25 +84,21 @@ DriveSyncHandler.prototype = {
  * @param {Array.<FileTransferStatus>} statusList List of drive status.
  * @private
  */
-DriveSyncHandler.prototype.onFileTransfersUpdated_ = function(statusList) {
-  var completed = false;
-  for (var i = 0; i < statusList.length; i++) {
-    var status = statusList[i];
-    switch (status.transferState) {
-      case 'added':
-      case 'in_progress':
-      case 'started':
-        this.updateItem_(status);
-        break;
-      case 'completed':
-      case 'failed':
-        if (status.num_total_jobs === 1)
-          this.removeItem_(status);
-        break;
-      default:
-        throw new Error(
-            'Invalid transfer state: ' + status.transferState + '.');
-    }
+DriveSyncHandler.prototype.onFileTransfersUpdated_ = function(status) {
+  switch (status.transferState) {
+    case 'added':
+    case 'in_progress':
+    case 'started':
+      this.updateItem_(status);
+      break;
+    case 'completed':
+    case 'failed':
+      if (status.num_total_jobs === 1)
+        this.removeItem_(status);
+      break;
+    default:
+      throw new Error(
+          'Invalid transfer state: ' + status.transferState + '.');
   }
 };
 

ui/file_manager/file_manager/foreground/js/file_manager.js

@@ -3026,23 +3026,17 @@ var BOTTOM_MARGIN_FOR_PREVIEW_PANEL_PX = 52;
     var bytesTotal = 0;
     var bytesDone = 0;
 
-    var onFileTransfersUpdated = function(statusList) {
-      for (var index = 0; index < statusList.length; index++) {
-        var status = statusList[index];
-        var escaped = encodeURI(status.fileUrl);
-        if (!(escaped in progressMap)) continue;
-        if (status.total == -1) continue;
-
-        var old = progressMap[escaped];
-        if (old == -1) {
-          // -1 means we don't know file size yet.
-          bytesTotal += status.total;
-          filesStarted++;
-          old = 0;
-        }
-        bytesDone += status.processed - old;
-        progressMap[escaped] = status.processed;
+    var onFileTransfersUpdated = function(status) {
+      var escaped = encodeURI(status.fileUrl);
+      var old = progressMap[escaped];
+      if (old == -1) {
+        // -1 means we don't know file size yet.
+        bytesTotal += status.total;
+        filesStarted++;
+        old = 0;
       }
+      bytesDone += status.processed - old;
+      progressMap[escaped] = status.processed;
 
       var percent = bytesTotal == 0 ? 0 : bytesDone / bytesTotal;
       // For files we don't have information about, assume the progress is zero.