Delete the stability file on clean exit.

components/browser_watcher/stability_debugging_win.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/browser_watcher/stability_debugging_win.h"
 
 #include <string>
 
+#include "base/feature_list.h"
+#include "base/files/file.h"
 #include "base/metrics/persistent_memory_allocator.h"
 #include "base/path_service.h"
+#include "base/process/process.h"
 #include "base/strings/stringprintf.h"
 #include "base/time/time.h"
+#include "components/browser_watcher/features.h"
 
 namespace browser_watcher {
 
 namespace {
 
 bool GetCreationTime(const base::Process& process, base::Time* time) {
   DCHECK(time);
 
   FILETIME creation_time = {};
   FILETIME ignore1 = {};
@@ skipping 30 matching lines @@
   *file_path = stability_dir.AppendASCII(file_name).AddExtension(
       base::PersistentMemoryAllocator::kFileExtension);
   return true;
 }
 
 base::FilePath::StringType GetStabilityFilePattern() {
   return base::FilePath::StringType(FILE_PATH_LITERAL("*-*")) +
          base::PersistentMemoryAllocator::kFileExtension;
 }
 
+void MarkStabilityFileForDeletion(const base::FilePath& user_data_dir) {
+  if (!base::FeatureList::IsEnabled(
+          browser_watcher::kStabilityDebuggingFeature)) {
+    return;
+  }
+
+  base::FilePath stability_file;
+  if (!GetStabilityFileForProcess(base::Process::Current(), user_data_dir,
+                                  &stability_file)) {
+    // TODO(manzagop): add a metric for this.
+    return;
+  }
+
+  // Open (with delete) and then immediately close the file by going out of
+  // scope. This should cause the stability debugging file to be deleted prior
+  // to the next execution.
+  base::File file(stability_file, base::File::FLAG_OPEN |
+                                      base::File::FLAG_READ |
+                                      base::File::FLAG_DELETE_ON_CLOSE);
+}
+
 }  // namespace browser_watcher