Use PowerSaveBlocker for audio and video on Chrome OS.

chrome/browser/drive/drive_uploader.cc

Index: chrome/browser/drive/drive_uploader.cc
diff --git a/chrome/browser/drive/drive_uploader.cc b/chrome/browser/drive/drive_uploader.cc
index a298eaf3e621d658ae8067ceb6cc319b2964e96e..76709fdb6608632181e40f53271f5cbd35f5ce43 100644
--- a/chrome/browser/drive/drive_uploader.cc
+++ b/chrome/browser/drive/drive_uploader.cc
@@ -59,10 +59,10 @@ struct DriveUploader::UploadFileInfo {
         next_start_position(-1),
         power_save_blocker(content::PowerSaveBlocker::Create(
             content::PowerSaveBlocker::kPowerSaveBlockPreventAppSuspension,
+            content::PowerSaveBlocker::kReasonOther,
             "Upload in progress")),
         cancelled(false),
-        weak_ptr_factory_(this) {
-  }
+        weak_ptr_factory_(this) {}
 
   ~UploadFileInfo() {
   }