[CrOS] Enumerate existing mount points and check for media devices.

BUG=none
TEST=none


Review URL: https://chromiumcodereview.appspot.com/10843061

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@149812 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/media_gallery/media_device_notifications_chromeos.cc

@@ -46,6 +46,7 @@ using content::BrowserThread;
 MediaDeviceNotifications::MediaDeviceNotifications() {
   DCHECK(disks::DiskMountManager::GetInstance());
   disks::DiskMountManager::GetInstance()->AddObserver(this);
+  CheckExistingMountPointsOnUIThread();
 }
 
 MediaDeviceNotifications::~MediaDeviceNotifications() {
@@ -55,6 +56,19 @@ MediaDeviceNotifications::~MediaDeviceNotifications() {
   }
 }
 
+void MediaDeviceNotifications::CheckExistingMountPointsOnUIThread() {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  const disks::DiskMountManager::MountPointMap& mount_point_map =
+      disks::DiskMountManager::GetInstance()->mount_points();
+  for (disks::DiskMountManager::MountPointMap::const_iterator it =
+           mount_point_map.begin(); it != mount_point_map.end(); ++it) {
+    BrowserThread::PostTask(
+        BrowserThread::FILE, FROM_HERE,
+        base::Bind(&MediaDeviceNotifications::CheckMountedPathOnFileThread,
+                   this, it->second));
+  }
+}
+
 void MediaDeviceNotifications::DiskChanged(
     disks::DiskMountManagerEventType event,
     const disks::DiskMountManager::Disk* disk) {

chrome/browser/media_gallery/media_device_notifications_chromeos.h

@@ -47,6 +47,10 @@ class MediaDeviceNotifications
   // Private to avoid code deleting the object.
   virtual ~MediaDeviceNotifications();
 
+  // Checks existing mount points map for media devices. For each mount point,
+  // call CheckMountedPathOnFileThread() below.
+  void CheckExistingMountPointsOnUIThread();
+
   // Checks if the mount point in |mount_info| is a media device. If it is,
   // then continue with AddMountedPathOnUIThread() below.
   void CheckMountedPathOnFileThread(