Move new Startup.FirstWebContents.* stats to Startup.FirstWebContents.*2.

chrome/browser/metrics/first_web_contents_profiler.h

Index: chrome/browser/metrics/first_web_contents_profiler.h
diff --git a/chrome/browser/metrics/first_web_contents_profiler.h b/chrome/browser/metrics/first_web_contents_profiler.h
index daeacd18d2f093bdf23747056237060167cc0375..d0cf306d0ef420d8287f0ac0878e7c87adae8b5e 100644
--- a/chrome/browser/metrics/first_web_contents_profiler.h
+++ b/chrome/browser/metrics/first_web_contents_profiler.h
@@ -89,6 +89,11 @@ class FirstWebContentsProfiler : public content::WebContentsObserver {
   // Whether an attempt was made to collect the "MainNavigationFinished" metric.
   bool collected_main_navigation_finished_metric_;
 
+  // Whether core metric collection is complete. Used to keep reporting old
+  // stats post abandon to give us an intra-milestone comparison basis initially
+  // between the old and new stats. TODO(gab): Remove this in M49.
+  bool finished_;
+
   // |delegate_| owns |this|.
   Delegate* delegate_;