Move SystemLogsSource class into new file

chrome/browser/feedback/system_logs/system_logs_fetcher.h

 // Copyright 2013 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_FETCHER_H_
 #define CHROME_BROWSER_FEEDBACK_SYSTEM_LOGS_SYSTEM_LOGS_FETCHER_H_
 
 #include <stddef.h>
 
 #include <map>
 #include <memory>
 #include <string>
 #include <vector>
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
+#include "chrome/browser/feedback/system_logs/system_logs_source.h"
 #include "components/feedback/anonymizer_tool.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*)>;
-
 // Callback that the SystemLogsFetcher uses to return data.
 using SysLogsFetcherCallback =
     base::Callback<void(std::unique_ptr<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();

[afakhry, 2017/07/06 21:43:05]

Sorry, I think I missed noticing in the review that you forgot to remove the
corresponding definitions in the system_logs_fetcher.cc file. Can you please do
that?

-
-  // 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_;
-};
-
 // The SystemLogsFetcher fetches key-value data from a list of log sources.
 //
 // EXAMPLE:
 // class Example {
 //  public:
 //   void ProcessLogs(SystemLogsResponse* response) {
 //      // do something with the logs
 //   }
 //   void GetLogs() {
 //     SystemLogsFetcher* fetcher = new SystemLogsFetcher(/*scrub_data=*/ true);
@@ skipping 36 matching lines @@
   std::unique_ptr<feedback::AnonymizerTool> anonymizer_;
 
   base::WeakPtrFactory<SystemLogsFetcher> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(SystemLogsFetcher);
 };
 
 }  // namespace system_logs
 
 #endif  // CHROME_BROWSER_FEEDBACK_SYSTEM_LOGS_SYSTEM_LOGS_FETCHER_H_