Record metrics for slow startups

chrome/browser/safe_browsing/database_manager.cc

Index: chrome/browser/safe_browsing/database_manager.cc
diff --git a/chrome/browser/safe_browsing/database_manager.cc b/chrome/browser/safe_browsing/database_manager.cc
index 5c82eed240a38109d70a36411a4a7c63a110b822..849e294e592bf4320b8917fd255ce31ceb68e7f4 100644
--- a/chrome/browser/safe_browsing/database_manager.cc
+++ b/chrome/browser/safe_browsing/database_manager.cc
@@ -27,6 +27,7 @@
 #include "chrome/common/chrome_notification_types.h"
 #include "chrome/common/chrome_paths.h"
 #include "chrome/common/chrome_switches.h"
+#include "chrome/common/startup_metric_utils.h"
 #include "chrome/common/url_constants.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/notification_service.h"
@@ -500,6 +501,8 @@ SafeBrowsingDatabase* SafeBrowsingDatabaseManager::GetDatabase() {
   DCHECK_EQ(MessageLoop::current(), safe_browsing_thread_->message_loop());
   if (database_)
     return database_;
+  startup_metric_utils::ScopedSlowStartupUMA
+      scoped_timer("Startup.SlowStartupSafeBrowsingGetDatabase");

[Scott Hess - ex-Googler, 2013/01/07 21:47:25]

I believe that this will measure the time to load the prefixset into memory. 
Other calls in the Init() below just set variables.

   const base::TimeTicks before = base::TimeTicks::Now();
 
   SafeBrowsingDatabase* database =