Move SafeBrowsing trace events to the loader category

chrome/browser/safe_browsing/safe_browsing_service.cc

Index: chrome/browser/safe_browsing/safe_browsing_service.cc
diff --git a/chrome/browser/safe_browsing/safe_browsing_service.cc b/chrome/browser/safe_browsing/safe_browsing_service.cc
index fbd10264f77647572f935fcc9734021f1266db6f..bec21ac599cb5a3d6291b1af373c28266d6f499b 100644
--- a/chrome/browser/safe_browsing/safe_browsing_service.cc
+++ b/chrome/browser/safe_browsing/safe_browsing_service.cc
@@ -373,7 +373,7 @@ void SafeBrowsingService::AddDownloadManager(
 
 void SafeBrowsingService::OnResourceRequest(const net::URLRequest* request) {
 #if defined(FULL_SAFE_BROWSING)
-  TRACE_EVENT1("SafeBrowsing", "SafeBrowsingServer::OnResourceRequest", "url",
+  TRACE_EVENT1("loader", "SafeBrowsingService::OnResourceRequest", "url",
                request->url().spec());
   if (off_domain_inclusion_detector_)
     off_domain_inclusion_detector_->OnResourceRequest(request);