Show password sync status in CBD

components/browsing_data/core/counters/browsing_data_counter.cc

Index: components/browsing_data/core/counters/browsing_data_counter.cc
diff --git a/components/browsing_data/core/counters/browsing_data_counter.cc b/components/browsing_data/core/counters/browsing_data_counter.cc
index 48a80180c5b3d7b027a0d5b95ffb05406d2f29de..fecc32c8740d37d4abdbb5f678774b751febc065 100644
--- a/components/browsing_data/core/counters/browsing_data_counter.cc
+++ b/components/browsing_data/core/counters/browsing_data_counter.cc
@@ -139,7 +139,9 @@ void BrowsingDataCounter::TransitionToReadyToReportResult() {
 // BrowsingDataCounter::Result -------------------------------------------------
 
 BrowsingDataCounter::Result::Result(const BrowsingDataCounter* source)
-    : source_(source) {}
+    : source_(source) {
+  DCHECK(source);
+}
 
 BrowsingDataCounter::Result::~Result() {}