sync: Track validity of about:sync fields

chrome/browser/performance_monitor/performance_monitor_browsertest.cc

Index: chrome/browser/performance_monitor/performance_monitor_browsertest.cc
diff --git a/chrome/browser/performance_monitor/performance_monitor_browsertest.cc b/chrome/browser/performance_monitor/performance_monitor_browsertest.cc
index 7d554684108a69ef8645f2856e45bdd28cb5de09..8e57798893ff9df4e756a043123d70bf78f99c8d 100644
--- a/chrome/browser/performance_monitor/performance_monitor_browsertest.cc
+++ b/chrome/browser/performance_monitor/performance_monitor_browsertest.cc
@@ -410,7 +410,8 @@ IN_PROC_BROWSER_TEST_F(PerformanceMonitorBrowserTest, KilledByOSEvent) {
 }
 #endif  // !defined(OS_WIN)
 
-IN_PROC_BROWSER_TEST_F(PerformanceMonitorBrowserTest, RendererCrashEvent) {
+IN_PROC_BROWSER_TEST_F(PerformanceMonitorBrowserTest,
+                       DISABLED_RendererCrashEvent) {
   ui_test_utils::NavigateToURL(browser(), GURL(chrome::kChromeUICrashURL));
 
   std::vector<linked_ptr<Event> > events = GetEvents();