Delete the stability file on clean exit.

components/browser_watcher/stability_debugging_win.h

Index: components/browser_watcher/stability_debugging_win.h
diff --git a/components/browser_watcher/stability_debugging_win.h b/components/browser_watcher/stability_debugging_win.h
index 08edd48b3860b7fdc91fc9d61ef0009bafe38e43..3ac14be048bbcb1decd34205859f3615e3b60777 100644
--- a/components/browser_watcher/stability_debugging_win.h
+++ b/components/browser_watcher/stability_debugging_win.h
@@ -23,6 +23,9 @@ bool GetStabilityFileForProcess(const base::Process& process,
 // Returns a pattern that matches file names returned by GetFileForProcess.
 base::FilePath::StringType GetStabilityFilePattern();
 
+// Marks the stability file for deletion.
+void MarkStabilityFileForDeletion(const base::FilePath& user_data_dir);
+
 }  // namespace browser_watcher
 
 #endif  // COMPONENTS_BROWSER_WATCHER_STABILITY_DEBUGGING_WIN_H_