Add the most recent crash report IDs to feedback reports

chrome/browser/feedback/system_logs/log_sources/crash_ids_source.h

+// 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.
+
+#ifndef CHROME_BROWSER_FEEDBACK_SYSTEM_LOGS_LOG_SOURCES_CRASH_IDS_SOURCE_H_
+#define CHROME_BROWSER_FEEDBACK_SYSTEM_LOGS_LOG_SOURCES_CRASH_IDS_SOURCE_H_
+
+#include <vector>
+
+#include "base/callback_forward.h"
+#include "chrome/browser/feedback/system_logs/system_logs_fetcher_base.h"
+#include "components/upload_list/crash_upload_list.h"
+#include "components/upload_list/upload_list.h"
+
+namespace system_logs {
+
+// Extract the most recent crash IDs (if any) and adds them to the system logs.
+class CrashIdsSource : public SystemLogsSource, public UploadList::Delegate {
+ public:
+  CrashIdsSource();
+  ~CrashIdsSource() override;
+
+  // SystemLogsSource:
+  void Fetch(const SysLogsSourceCallback& callback) override;
+
+  // UploadList::Delegate:
+  void OnUploadListAvailable() override;
+
+ private:
+  void RespondWithCrashIds(const SysLogsSourceCallback& callback) const;
+
+  scoped_refptr<CrashUploadList> crash_upload_list_;
+
+  // A comma-separated list of crash IDs as expected by the server.
+  std::string crash_ids_list_;
+
+  // Contains any pending fetch requests waiting for the crash upload list to
+  // finish loading.
+  using Requests = base::Closure;

[Rahul Chaturvedi, 2016/09/08 19:58:24]

This seems, not very useful. base::Closure is barely a few more characters than
'Requests' and makes it very clear what the type is.

[afakhry, 2016/09/09 22:20:10]

Makes sense ... Done.

+  std::vector<Requests> pending_requests_;
+
+  // True if the crash list is currently being loaded.
+  bool pending_crash_list_loading_;
+
+  DISALLOW_COPY_AND_ASSIGN(CrashIdsSource);
+};
+
+}  // namespace system_logs
+
+#endif  // CHROME_BROWSER_FEEDBACK_SYSTEM_LOGS_LOG_SOURCES_CRASH_IDS_SOURCE_H_