Submit a sample of notification images to Safe Browsing

chrome/browser/safe_browsing/notification_image_reporter.h

+// Copyright 2017 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_NOTIFICATION_IMAGE_REPORTER_H_
+#define CHROME_BROWSER_SAFE_BROWSING_NOTIFICATION_IMAGE_REPORTER_H_
+
+#include <queue>

[Peter Beverloo, 2017/01/11 18:23:56]

#include <memory>

[johnme, 2017/01/11 20:05:07]

Done.

+
+#include "base/macros.h"
+#include "base/memory/ref_counted.h"
+#include "base/time/time.h"
+#include "ui/gfx/geometry/size.h"
+
+class GURL;
+class Profile;
+class SkBitmap;
+
+namespace base {
+class RefCountedMemory;
+}  // namespace base
+
+namespace net {
+class ReportSender;
+class URLRequestContext;
+}  // namespace net
+
+namespace safe_browsing {
+
+class SafeBrowsingService;
+
+// Provides functionality for building and sending reports about notification
+// content images to the Safe Browsing CSD server.
+class NotificationImageReporter
+    : public base::RefCountedThreadSafe<NotificationImageReporter> {
+ public:
+  explicit NotificationImageReporter(net::URLRequestContext* request_context);
+
+  // Reports notification content image to SafeBrowsing CSD server if necessary.
+  // Can only be called on UI thread.
+  void ReportNotificationImageOnUI(Profile* profile,
+                                   const GURL& origin,
+                                   const SkBitmap& image);
+
+ private:
+  friend class base::RefCountedThreadSafe<NotificationImageReporter>;
+  ~NotificationImageReporter();
+
+  // Report notification content image to SafeBrowsing CSD server if necessary.

[Peter Beverloo, 2017/01/11 18:23:56]

"if necessary" -> would be cool to give a one sentence summary of how that's
decided.

[johnme, 2017/01/11 20:05:07]

Done ("if the user has opted in, the origin is not whitelisted, and it is
randomly sampled").

+  void ReportNotificationImageOnIO(
+      scoped_refptr<SafeBrowsingService> safe_browsing_service,
+      const GURL& origin,
+      const SkBitmap& image);
+
+  // Downscales image to fit within 512x512 if necessary, and encodes as it PNG.
+  void DownscaleNotificationImageOnBlockingPool(const GURL& origin,
+                                                const SkBitmap& image);
+
+  // Serializes report using NotificationImageReportRequest protobuf defined in
+  // chrome/common/safe_browsing/csd.proto and sends it to CSD server.
+  void SendReportOnIO(const GURL& origin,
+                      scoped_refptr<base::RefCountedMemory> png_data,
+                      gfx::Size dimensions,
+                      gfx::Size original_dimensions);

[Peter Beverloo, 2017/01/11 18:23:56]

micro nit: we usually pass gfx::Size as a const&

[johnme, 2017/01/11 20:05:07]

Done.

+
+  std::unique_ptr<net::ReportSender> report_sender_;
+
+  // Timestamps of when we sent notification images. Used to limit the number
+  // of requests that we send in a day.
+  // TODO(johnme): Serialize this so that it doesn't reset on browser restart.
+  std::queue<base::Time> report_times_;
+
+  DISALLOW_COPY_AND_ASSIGN(NotificationImageReporter);
+};
+
+}  // namespace safe_browsing
+
+#endif  // CHROME_BROWSER_SAFE_BROWSING_NOTIFICATION_IMAGE_REPORTER_H_