Add feedback uploader to upload reports in a sequenced manner with retries.

chrome/browser/feedback/feedback_uploader_delegate.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_DELEGATE_H_
+#define CHROME_BROWSER_FEEDBACK_FEEDBACK_UPLOADER_DELEGATE_H_
+
+#include <string>
+
+#include "base/basictypes.h"
+#include "base/callback.h"
+#include "base/memory/scoped_ptr.h"
+#include "net/url_request/url_fetcher_delegate.h"
+
+namespace feedback {
+
+typedef base::Callback<void(scoped_ptr<std::string>)> ReportDataCallback;
+
+// FeedbackUploaderDelegate is a simple http uploader for a feedback report. On
+// succes or failure, it deletes itself, but on failure it also notifies the
+// error callback specified when constructing the class instance.
+class FeedbackUploaderDelegate : public net::URLFetcherDelegate {
+ public:
+  FeedbackUploaderDelegate(scoped_ptr<std::string> post_body,
+                           const base::Closure& success_callback,
+                           const ReportDataCallback& error_callback);
+  virtual ~FeedbackUploaderDelegate();
+
+ private:
+  // Overridden from net::URLFetcherDelegate.
+  virtual void OnURLFetchComplete(const net::URLFetcher* source) OVERRIDE;
+
+  scoped_ptr<std::string> post_body_;
+  base::Closure success_callback_;
+  ReportDataCallback error_callback_;
+
+  DISALLOW_COPY_AND_ASSIGN(FeedbackUploaderDelegate);
+};
+
+}  // namespace feedback
+
+#endif  // CHROME_BROWSER_FEEDBACK_FEEDBACK_UPLOADER_DELEGATE_H_