Move some of c/b/feedback/system_logs to //components/feedback

chrome/browser/feedback/system_logs/system_logs_source.h

-// Copyright 2017 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_SYSTEM_LOGS_SOURCE_H_
-#define CHROME_BROWSER_FEEDBACK_SYSTEM_LOGS_SYSTEM_LOGS_SOURCE_H_
-
-#include <string>
-
-#include "base/callback.h"
-#include "components/feedback/feedback_common.h"
-
-namespace system_logs {
-
-using SystemLogsResponse = FeedbackCommon::SystemLogsMap;
-
-// Callback that the data sources use to return data.
-using SysLogsSourceCallback = base::Callback<void(SystemLogsResponse*)>;
-
-// The SystemLogsSource provides an interface for the data sources that
-// the SystemLogsFetcher class uses to fetch logs and other information.
-class SystemLogsSource {
- public:
-  // |source_name| provides a descriptive identifier for debugging.
-  explicit SystemLogsSource(const std::string& source_name);
-  virtual ~SystemLogsSource();
-
-  // Fetches data and passes it by pointer to the callback
-  virtual void Fetch(const SysLogsSourceCallback& callback) = 0;
-
-  const std::string& source_name() const { return source_name_; }
-
- private:
-  std::string source_name_;
-};
-
-}  // namespace system_logs
-
-#endif  // CHROME_BROWSER_FEEDBACK_SYSTEM_LOGS_SYSTEM_LOGS_SOURCE_H_