Add guards to metric values; erase bad events/metrics from db

chrome/browser/performance_monitor/startup_timer.cc

Index: chrome/browser/performance_monitor/startup_timer.cc
diff --git a/chrome/browser/performance_monitor/startup_timer.cc b/chrome/browser/performance_monitor/startup_timer.cc
index 0af0a57bdc54d92a668c76a2a56619112427679e..c6e581662062fbccb89e6f4d486111db0fd87b72 100644
--- a/chrome/browser/performance_monitor/startup_timer.cc
+++ b/chrome/browser/performance_monitor/startup_timer.cc
@@ -21,9 +21,8 @@ namespace performance_monitor {
 namespace {
 // Needed because Database::AddMetric is overloaded, so base::Bind doesn't work.
 void AddMetricToDatabaseOnBackgroundThread(Database* database,
-                                           MetricType metric,
-                                           std::string value) {
-  database->AddMetric(metric, value);
+                                           Metric metric) {
+  database->AddMetric(metric);
 }
 
 }  // namespace
@@ -114,9 +113,11 @@ void StartupTimer::InsertElapsedStartupTime() {
       base::Bind(
           &AddMetricToDatabaseOnBackgroundThread,
           base::Unretained(PerformanceMonitor::GetInstance()->database()),
-          startup_type_ == STARTUP_NORMAL ? METRIC_STARTUP_TIME
-                                          : METRIC_TEST_STARTUP_TIME,
-          base::Int64ToString(elapsed_startup_time_.ToInternalValue())));
+          Metric(startup_type_ == STARTUP_NORMAL ? METRIC_STARTUP_TIME
+                                                 : METRIC_TEST_STARTUP_TIME,
+                 base::Time::Now(),
+                 static_cast<double>(
+                     elapsed_startup_time_.ToInternalValue()))));
 }
 
 void StartupTimer::InsertElapsedSessionRestoreTime() {
@@ -129,8 +130,9 @@ void StartupTimer::InsertElapsedSessionRestoreTime() {
         base::Bind(
             &AddMetricToDatabaseOnBackgroundThread,
             base::Unretained(PerformanceMonitor::GetInstance()->database()),
-            METRIC_SESSION_RESTORE_TIME,
-            base::Int64ToString(iter->ToInternalValue())));
+            Metric(METRIC_SESSION_RESTORE_TIME,
+                   base::Time::Now(),
+                   static_cast<double>(iter->ToInternalValue()))));
   }
 }