Mirror syncfs log to console and WebUI, with LogSeverity support.

chrome/browser/sync_file_system/drive_file_sync_service.cc

Index: chrome/browser/sync_file_system/drive_file_sync_service.cc
diff --git a/chrome/browser/sync_file_system/drive_file_sync_service.cc b/chrome/browser/sync_file_system/drive_file_sync_service.cc
index 17c43aa59c4e552b85dc15936e108f9218c0b4e0..e8ac45a0ca9911c147b3738c47f4c191d0468412 100644
--- a/chrome/browser/sync_file_system/drive_file_sync_service.cc
+++ b/chrome/browser/sync_file_system/drive_file_sync_service.cc
@@ -1453,7 +1453,7 @@ void DriveFileSyncService::MaybeStartFetchChanges() {
 }
 
 void DriveFileSyncService::OnNotificationReceived() {
-  util::Log("Notification received to check for Google Drive updates");
+  SYNCFS_LOG(INFO, "Notification received to check for Google Drive updates");
   // TODO(calvinlo): Try to eliminate may_have_unfetched_changes_ variable.
   may_have_unfetched_changes_ = true;
   MaybeStartFetchChanges();
@@ -1461,7 +1461,7 @@ void DriveFileSyncService::OnNotificationReceived() {
 
 void DriveFileSyncService::OnPushNotificationEnabled(bool enabled) {
   const char* status = (enabled ? "enabled" : "disabled");
-  util::Log("XMPP Push notification is %s", status);
+  SYNCFS_LOG(INFO, "XMPP Push notification is %s", status);
 }
 
 void DriveFileSyncService::MaybeScheduleNextTask() {
@@ -1583,12 +1583,14 @@ void DriveFileSyncService::DidFetchChangesForIncrementalSync(
   }
 
   if (reset_sync_root) {
-    LOG(WARNING) << "Detected unexpected SyncRoot deletion.";
+    SYNCFS_LOG(WARNING, "Detected unexpected SyncRoot deletion.");
     metadata_store_->SetSyncRootDirectory(std::string());
   }
   for (std::set<GURL>::iterator itr = reset_origins.begin();
        itr != reset_origins.end(); ++itr) {
-    LOG(WARNING) << "Detected unexpected OriginRoot deletion:" << itr->spec();
+    SYNCFS_LOG(WARNING,
+               "Detected unexpected OriginRoot deletion: %s",
+               itr->spec().c_str());
     pending_batch_sync_origins_.erase(*itr);
     metadata_store_->SetOriginRootDirectory(*itr, std::string());
   }