Add an observer interface for DriveScheduler.

chrome/browser/chromeos/drive/drive_scheduler.cc

Index: chrome/browser/chromeos/drive/drive_scheduler.cc
diff --git a/chrome/browser/chromeos/drive/drive_scheduler.cc b/chrome/browser/chromeos/drive/drive_scheduler.cc
index 9b5b5b35257e522136f1a236b9e1ec48dbbe84f8..2a4ea42e485bc9475c1c0def7086b928f5f28742 100644
--- a/chrome/browser/chromeos/drive/drive_scheduler.cc
+++ b/chrome/browser/chromeos/drive/drive_scheduler.cc
@@ -30,15 +30,6 @@ const int DriveScheduler::kMaxJobCount[] = {
   1,  // FILE_QUEUE
 };
 
-DriveScheduler::JobInfo::JobInfo(JobType in_job_type)
-    : job_type(in_job_type),
-      job_id(-1),
-      completed_bytes(0),
-      total_bytes(0),
-      state(STATE_NONE) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-}
-
 DriveScheduler::QueueEntry::QueueEntry()
     : job_id(-1),
       context(DriveClientContext(USER_INITIATED)) {
@@ -101,13 +92,23 @@ void DriveScheduler::Initialize() {
   initialized_ = true;
 }
 
-std::vector<DriveScheduler::JobInfo> DriveScheduler::GetJobInfoList() {
+std::vector<JobInfo> DriveScheduler::GetJobInfoList() {
   std::vector<JobInfo> job_info_list;
   for (JobIDMap::iterator iter(&job_map_); !iter.IsAtEnd(); iter.Advance())
     job_info_list.push_back(*iter.GetCurrentValue());
   return job_info_list;
 }
 
+void DriveScheduler::AddObserver(JobListObserver* observer) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  observer_list_.AddObserver(observer);
+}
+
+void DriveScheduler::RemoveObserver(JobListObserver* observer) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  observer_list_.RemoveObserver(observer);
+}
+
 void DriveScheduler::GetAccountMetadata(
     const google_apis::GetAccountMetadataCallback& callback) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
@@ -903,4 +904,19 @@ DriveScheduler::QueueType DriveScheduler::GetJobQueueType(JobType type) {
   return FILE_QUEUE;
 }
 
+void DriveScheduler::NotifyJobAdded(const JobInfo& job_info) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  FOR_EACH_OBSERVER(JobListObserver, observer_list_, OnJobAdded(job_info));
+}
+
+void DriveScheduler::NotifyJobDone(const JobInfo& job_info) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  FOR_EACH_OBSERVER(JobListObserver, observer_list_, OnJobDone(job_info));
+}
+
+void DriveScheduler::NotifyJobUpdated(const JobInfo& job_info) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  FOR_EACH_OBSERVER(JobListObserver, observer_list_, OnJobUpdated(job_info));
+}
+
 }  // namespace drive