Cache feedback reports to disk in case of send failure.

chrome/browser/feedback/feedback_profile_observer.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_PROFILE_OBSERVER_H_
+#define CHROME_BROWSER_FEEDBACK_FEEDBACK_PROFILE_OBSERVER_H_
+
+#include <queue>
+#include <string>
+
+#include "base/basictypes.h"
+#include "base/lazy_instance.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"
+#include "content/public/browser/notification_observer.h"
+#include "content/public/browser/notification_registrar.h"
+
+namespace content {
+class BrowserContext;
+}
+
+namespace feedback {
+
+// FeedbackProfileObserver waits on profile creation notifications to check
+// if the profile has any pending feedback reports to upload. If it does, it
+// queues those reports for upload.
+class FeedbackProfileObserver : public content::NotificationObserver {
+ public:
+  static void Initialize();
+
+ private:
+  friend struct base::DefaultLazyInstanceTraits<FeedbackProfileObserver>;
+
+  FeedbackProfileObserver();
+  virtual ~FeedbackProfileObserver();
+
+  // content::NotificationObserver override
+  virtual void Observe(int type,
+                       const content::NotificationSource& source,
+                       const content::NotificationDetails& details) OVERRIDE;
+
+  // Loads any unsent reports from disk and queues them to be uploaded in
+  // the given browser context.
+  void QueueUnsentReports(content::BrowserContext* context);
+
+  // Used to track creation of profiles so we can load any unsent reports
+  // for that profile.
+  content::NotificationRegistrar prefs_registrar_;
+
+  DISALLOW_COPY_AND_ASSIGN(FeedbackProfileObserver);
+};
+
+}  // namespace feedback
+
+#endif  // CHROME_BROWSER_FEEDBACK_FEEDBACK_PROFILE_OBSERVER_H_