Add permission reporter skeleton

chrome/browser/safe_browsing/permission_reporter.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_PERMISSION_REPORTER_H_
+#define CHROME_BROWSER_SAFE_BROWSING_PERMISSION_REPORTER_H_
+
+#include <string>
+
+#include "chrome/browser/permissions/permission_uma_util.h"
+#include "url/gurl.h"
+
+namespace net {
+class URLRequestContext;
+}  // namespace net
+
+namespace safe_browsing {
+
+// Provides functionality for building and serializing reports about permissions
+// to a report collection server.
+class PermissionReporter {
+ public:
+  // Creates a permission reporter that will send permission reports to
+  // the SafeBrowsing permission action server, using |request_context| as the
+  // context for the reports.
+  explicit PermissionReporter(net::URLRequestContext* request_context);
+
+  ~PermissionReporter();
+
+  // Sends a permission report to the report collection server. The
+  // |serialized_report| is expected to be a serialized protobuf of type
+  // PermissionReport defined in
+  // //src/chrome/common/safe_browsing/permission_report.proto
+  void SendReport(const std::string& serialized_report);

[raymes, 2016/06/01 06:45:45]

nit: I wonder if SendReport should just call BuildReport internally, rather than
having 2 methods? kcarattini: is there a benefit to keeping these separate? 

[kcarattini, 2016/06/01 12:25:49]

Yup, that could work. BuildReport should remain a separate method so that it can
be tested separately, but I'm find with SendReport calling it directly.

[stefanocs, 2016/06/02 00:24:32]

Then SendReport signature should be modified to have the same arguments as
BuildReport except the string output?

[stefanocs, 2016/06/02 04:31:04]

Done.

+
+  // Builds and serializes a permission report with |origin| as the origin of
+  // the site requesting permission, |permission| as the type of permission
+  // requested, and |action| as the action taken. The serialized report is
+  // written into |output|. Returns true if the serialization was successful and
+  // false otherwise.
+  static bool BuildReport(const GURL& origin,
+                          content::PermissionType permission,

[raymes, 2016/06/01 06:45:44]

nit: #include permission_type.h

[stefanocs, 2016/06/01 07:25:02]

Done.

+                          PermissionAction action,
+                          std::string* output);
+
+ private:
+  const GURL upload_url_;
+
+  DISALLOW_COPY_AND_ASSIGN(PermissionReporter);
+};
+
+}  // namespace safe_browsing
+
+#endif  // CHROME_BROWSER_SAFE_BROWSING_PERMISSION_REPORTER_H_