Bound the impact of system instability on chrome instability.

chrome/browser/chrome_browser_field_trials_desktop.cc

Index: chrome/browser/chrome_browser_field_trials_desktop.cc
diff --git a/chrome/browser/chrome_browser_field_trials_desktop.cc b/chrome/browser/chrome_browser_field_trials_desktop.cc
index 47715a06258dff1e92f36cdbb9c33c3b44687a00..57f1fd988786573d91ca91e16cc87e80dc0c3d61 100644
--- a/chrome/browser/chrome_browser_field_trials_desktop.cc
+++ b/chrome/browser/chrome_browser_field_trials_desktop.cc
@@ -18,6 +18,7 @@
 #include "base/metrics/field_trial.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/path_service.h"
+#include "base/time/time.h"
 #include "chrome/browser/features.h"
 #include "chrome/browser/prerender/prerender_field_trial.h"
 #include "chrome/common/chrome_features.h"
@@ -172,6 +173,8 @@ void SetupStabilityDebugging() {
 #elif defined(ARCH_CPU_X86_64)
     global_data.SetString(browser_watcher::kStabilityPlatform, "Win64");
 #endif
+    global_data.SetInt(browser_watcher::kStabilityStartTimestamp,
+                       base::Time::Now().ToInternalValue());
 
     // Record information about chrome's module. We want this to be done early.
     RecordChromeModuleInfo(global_tracker);