Add browsertest for permission action reporting

chrome/browser/safe_browsing/mock_report_sender.h

+// Copyright 2016 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_SAFE_BROWSING_MOCK_REPORT_SENDER_H_
+#define CHROME_BROWSER_SAFE_BROWSING_MOCK_REPORT_SENDER_H_
+
+#include "net/url_request/report_sender.h"
+
+namespace safe_browsing {
+
+// A mock ReportSender that keeps track of the last report sent.

[Jialiu Lin, 2016/07/26 16:28:02]

could you change the class name/file name/comment to indicate this is for
permission report?  Since we have other kind of report (e.g. safe browsing hit
report, SB extended report etc) in the same directory.  Could be a little bit
confusing. 

[stefanocs, 2016/07/27 04:11:19]

Done. Renamed the class to MockPermissionReportSender.

+class MockReportSender : public net::ReportSender {
+ public:
+  MockReportSender();
+
+  ~MockReportSender() override;
+
+  void Send(const GURL& report_uri, const std::string& report) override;
+
+  const GURL& latest_report_uri();
+
+  const std::string& latest_report();
+
+  int GetAndResetNumberOfReportsSent();
+
+ private:
+  GURL latest_report_uri_;
+  std::string latest_report_;
+  int number_of_reports_;
+
+  DISALLOW_COPY_AND_ASSIGN(MockReportSender);
+};
+
+}  // namespace safe_browsing
+
+#endif  // CHROME_BROWSER_SAFE_BROWSING_MOCK_REPORT_SENDER_H_