Fix needless environment scan in safe browsing incident reporting service.

chrome/browser/safe_browsing/incident_reporting/incident_reporting_service.cc

Index: chrome/browser/safe_browsing/incident_reporting/incident_reporting_service.cc
diff --git a/chrome/browser/safe_browsing/incident_reporting/incident_reporting_service.cc b/chrome/browser/safe_browsing/incident_reporting/incident_reporting_service.cc
index 38845ec84ad80ed413c48f006610ebad0e64ebfa..955e8d4b5047c05454f3201fcaacd45ab18b4ae4 100644
--- a/chrome/browser/safe_browsing/incident_reporting/incident_reporting_service.cc
+++ b/chrome/browser/safe_browsing/incident_reporting/incident_reporting_service.cc
@@ -398,8 +398,10 @@ void IncidentReportingService::OnProfileAdded(Profile* profile) {
 
   // Start a new report if this profile participates in safe browsing and there
   // are process-wide incidents.
-  if (safe_browsing_enabled && GetProfileContext(NULL))
+  if (safe_browsing_enabled && GetProfileContext(NULL) &&
+      GetProfileContext(NULL)->incidents.size()) {
     BeginReportProcessing();
+  }
 
   // TODO(grt): register for pref change notifications to start delayed analysis
   // and/or report processing if sb is currently disabled but subsequently