Cache feedback reports to disk in case of send failure.

chrome/browser/feedback/feedback_uploader.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_FEEDBACK_UPLOADER_H_
 #define CHROME_BROWSER_FEEDBACK_FEEDBACK_UPLOADER_H_
 
 #include <queue>
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/time/time.h"
 #include "base/timer/timer.h"
 #include "chrome/browser/feedback/feedback_uploader_delegate.h"
 #include "components/browser_context_keyed_service/browser_context_keyed_service.h"
 
 namespace content {
 class BrowserContext;
 }
 
 namespace feedback {
 
-struct FeedbackReport;
+class FeedbackReport;
 
 // FeedbackUploader is used to add a feedback report to the queue of reports
 // being uploaded. In case uploading a report fails, it is written to disk and
 // tried again when it's turn comes up next in the queue.
 class FeedbackUploader : public BrowserContextKeyedService,
                          public base::SupportsWeakPtr<FeedbackUploader> {
  public:
   explicit FeedbackUploader(content::BrowserContext* context);
   virtual ~FeedbackUploader();
 
-  void QueueReport(scoped_ptr<std::string> data);
+  // Queues a report for uploading.
+  void QueueReport(const std::string& data);
 
  private:
   friend class FeedbackUploaderTest;
   struct ReportsUploadTimeComparator {
-    bool operator()(const FeedbackReport& a, const FeedbackReport& b) const;
+    bool operator()(FeedbackReport* a, FeedbackReport* b) const;
   };
 
   // Dispatches the report to be uploaded.
-  void DispatchReport(scoped_ptr<std::string> data);
+  void DispatchReport(const std::string& data);
+
+  // Loads any unsent reports from disk and queues them to be uploaded in
+  // the given browser context.
+  void QueueUnsentReports(content::BrowserContext* context);
 
   // Update our timer for uploading the next report.
   void UpdateUploadTimer();
 
   // Requeue this report with a delay.
-  void RetryReport(scoped_ptr<std::string> data);
+  void RetryReport(const std::string& data);
 
   void setup_for_test(const ReportDataCallback& dispatch_callback,
                       const base::TimeDelta& retry_delay);
 
   // Browser context this uploader was created for.
   content::BrowserContext* context_;
   // Timer to upload the next report at.
   base::OneShotTimer<FeedbackUploader> upload_timer_;
   // Priority queue of reports prioritized by the time the report is supposed
   // to be uploaded at.
-  std::priority_queue<FeedbackReport,
-                      std::vector<FeedbackReport>,
+  std::priority_queue<scoped_refptr<FeedbackReport>,
+                      std::vector<scoped_refptr<FeedbackReport> >,
                       ReportsUploadTimeComparator> reports_queue_;
 
-  std::vector<FeedbackReport> loaded_reports_;
-
   ReportDataCallback dispatch_callback_;
   base::TimeDelta retry_delay_;
 
   DISALLOW_COPY_AND_ASSIGN(FeedbackUploader);
 };
 
 }  // namespace feedback
 
 #endif  // CHROME_BROWSER_FEEDBACK_FEEDBACK_UPLOADER_H_