Track execution phase of browser process when we log if the broswer has

chrome/browser/metrics/metrics_service.h

Index: chrome/browser/metrics/metrics_service.h
diff --git a/chrome/browser/metrics/metrics_service.h b/chrome/browser/metrics/metrics_service.h
index a827a7e48ce5b9dd2549445b2a5a534b670d9c87..57c1b9a049107226e08b73a265b40712280eea97 100644
--- a/chrome/browser/metrics/metrics_service.h
+++ b/chrome/browser/metrics/metrics_service.h
@@ -74,6 +74,17 @@ class MetricsService
       public net::URLFetcherDelegate,
       public MetricsServiceBase {
  public:
+  // The execution phase of the browser.
+  enum ExecutionPhase {
+    CLEAN_SHUTDOWN = 0,
+    START_METRICS_RECORDING = 100,
+    CREATE_PROFILE = 200,
+    STARTUP_TIMEBOMB_ARM = 300,
+    THREAD_WATCHER_START = 400,
+    MAIN_MESSAGE_LOOP_RUN = 500,
+    SHUTDOWN_TIMEBOMB_ARM = 600,
+  };
+
   MetricsService();
   virtual ~MetricsService();
 
@@ -164,6 +175,9 @@ class MetricsService
   static void LogNeedForCleanShutdown();
 #endif  // defined(OS_ANDROID) || defined(OS_IOS)
 
+  static void SetExecutionPhase(ExecutionPhase execution_phase) {
+    execution_phase_ = execution_phase;
+  }
   // Saves in the preferences if the crash report registration was successful.
   // This count is eventually send via UMA logs.
   void RecordBreakpadRegistration(bool success);
@@ -492,6 +506,9 @@ class MetricsService
   // Stores the time of the last call to |GetIncrementalUptime()|.
   base::TimeTicks last_updated_time_;
 
+  // Execution phase the browser is in.
+  static ExecutionPhase execution_phase_;
+
   // Reduntant marker to check that we completed our shutdown, and set the
   // exited-cleanly bit in the prefs.
   static ShutdownCleanliness clean_shutdown_status_;