Bug 1553855: Make the Classifier Update thread a LazyIdle thread r=dimi

Differential Revision: https://phabricator.services.mozilla.com/D32529

toolkit/components/url-classifier/Classifier.cpp

@@ -19,6 +19,7 @@
 #include "mozilla/EndianUtils.h"
 #include "mozilla/Telemetry.h"
 #include "mozilla/IntegerPrintfMacros.h"
+#include "mozilla/LazyIdleThread.h"
 #include "mozilla/Logging.h"
 #include "mozilla/SyncRunnable.h"
 #include "mozilla/Base64.h"
@@ -41,6 +42,8 @@ extern mozilla::LazyLogModule gUrlClassifierDbServiceLog;
 
 #define METADATA_SUFFIX NS_LITERAL_CSTRING(".metadata")
 
+#define DEFAULT_THREAD_TIMEOUT_MS 5000
+
 namespace mozilla {
 namespace safebrowsing {
 
@@ -128,8 +131,9 @@ Classifier::Classifier()
     : mIsTableRequestResultOutdated(true),
       mUpdateInterrupted(true),
       mIsClosed(false) {
-  NS_NewNamedThread(NS_LITERAL_CSTRING("Classifier Update"),
-                    getter_AddRefs(mUpdateThread));
+  // Make a lazy thread for any IO
+  mUpdateThread = new LazyIdleThread(DEFAULT_THREAD_TIMEOUT_MS,
+                                     NS_LITERAL_CSTRING("Classifier Update"));
 }
 
 Classifier::~Classifier() { Close(); }