Enrich fileBrowserPrivate.onFileTransfersUpdated event to support displaying total number of jobs.

chrome/browser/chromeos/drive/job_scheduler.cc

Index: chrome/browser/chromeos/drive/job_scheduler.cc
diff --git a/chrome/browser/chromeos/drive/job_scheduler.cc b/chrome/browser/chromeos/drive/job_scheduler.cc
index 13aa7df2d4e9296ca1b1eea5045157cb2d0245cb..0671105498eaea9dc49a92a461c3b85c9142fc65 100644
--- a/chrome/browser/chromeos/drive/job_scheduler.cc
+++ b/chrome/browser/chromeos/drive/job_scheduler.cc
@@ -704,6 +704,8 @@ void JobScheduler::StartJob(JobEntry* job) {
   DCHECK(!job->task.is_null());
 
   QueueJob(job->job_info.job_id);
+  const QueueType queue_type = GetJobQueueType(job->job_info.job_type);
+  job->job_info.num_total_jobs = queue_[queue_type]->GetNumberOfJobs();
   NotifyJobAdded(job->job_info);
   DoJobLoop(GetJobQueueType(job->job_info.job_type));
 }
@@ -715,7 +717,7 @@ void JobScheduler::QueueJob(JobID job_id) {
   DCHECK(job_entry);
   const JobInfo& job_info = job_entry->job_info;
 
-  QueueType queue_type = GetJobQueueType(job_info.job_type);
+  const QueueType queue_type = GetJobQueueType(job_info.job_type);
   queue_[queue_type]->Push(job_id, job_entry->context.type);
 
   const std::string retry_prefix = job_entry->retry_count > 0 ?
@@ -766,6 +768,7 @@ void JobScheduler::DoJobLoop(QueueType queue_type) {
   JobInfo* job_info = &entry->job_info;
   job_info->state = STATE_RUNNING;
   job_info->start_time = now;
+  job_info->num_total_jobs = queue_[queue_type]->GetNumberOfJobs();
   NotifyJobUpdated(*job_info);
 
   entry->cancel_callback = entry->task.Run();
@@ -853,6 +856,8 @@ bool JobScheduler::OnJobDone(JobID job_id, google_apis::GDataErrorCode error) {
   if (should_retry) {
     job_entry->cancel_callback.Reset();
     job_info->state = STATE_RETRY;
+    const QueueType queue_type = GetJobQueueType(job_info->job_type);
+    job_info->num_total_jobs = queue_[queue_type]->GetNumberOfJobs();
     NotifyJobUpdated(*job_info);
 
     ++job_entry->retry_count;
@@ -860,6 +865,8 @@ bool JobScheduler::OnJobDone(JobID job_id, google_apis::GDataErrorCode error) {
     // Requeue the job.
     QueueJob(job_id);
   } else {
+    const QueueType queue_type = GetJobQueueType(job_info->job_type);
+    job_info->num_total_jobs = queue_[queue_type]->GetNumberOfJobs();
     NotifyJobDone(*job_info, error);
     // The job has finished, no retry will happen in the scheduler. Now we can
     // remove the job info from the map.
@@ -1037,6 +1044,8 @@ void JobScheduler::UpdateProgress(JobID job_id, int64 progress, int64 total) {
   job_entry->job_info.num_completed_bytes = progress;
   if (total != -1)
     job_entry->job_info.num_total_bytes = total;
+  const QueueType queue_type = GetJobQueueType(job_entry->job_info.job_type);
+  job_entry->job_info.num_total_jobs = queue_[queue_type]->GetNumberOfJobs();
   NotifyJobUpdated(job_entry->job_info);
 }
 
@@ -1098,6 +1107,7 @@ void JobScheduler::AbortNotRunningJob(JobEntry* job,
   base::Callback<void(google_apis::GDataErrorCode)> callback =
       job->abort_callback;
   queue_[GetJobQueueType(job->job_info.job_type)]->Remove(job->job_info.job_id);
+  job->job_info.num_total_jobs = queue_[queue_type]->GetNumberOfJobs();
   NotifyJobDone(job->job_info, error);
   job_map_.Remove(job->job_info.job_id);
   base::MessageLoopProxy::current()->PostTask(FROM_HERE,