chromeos: Fix wrong error handling of SetLargestChangestamp

SetLargestChangestamp can fail when something is wrong with the disk.

BUG=None

Review URL: https://codereview.chromium.org/14189022

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@195439 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/chromeos/drive/change_list_processor.cc

@@ -26,8 +26,8 @@ void RunOnCompleteCallback(const base::Closure& on_complete_callback,
                            DriveFileError error) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   DCHECK(!on_complete_callback.is_null());
-  DCHECK_EQ(DRIVE_FILE_OK, error);
-
+  DLOG_IF(ERROR, error != DRIVE_FILE_OK) << "SetLargestChangeStamp failed: "
+                                         << DriveFileErrorToString(error);
   on_complete_callback.Run();
 }