Implement safebrowsing download feedback service, enabled for dev & canary only.

chrome/chrome_browser.gypi

 # Copyright 2012 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.
 
 {
   'targets': [
     {
       'target_name': 'browser',
       'type': 'static_library',
       'variables': { 'enable_wexit_time_destructors': 1, },
@@ skipping 1682 matching lines @@
         'browser/safe_browsing/browser_features.cc',
         'browser/safe_browsing/browser_features.h',
         'browser/safe_browsing/chunk_range.cc',
         'browser/safe_browsing/chunk_range.h',
         'browser/safe_browsing/client_side_detection_host.cc',
         'browser/safe_browsing/client_side_detection_host.h',
         'browser/safe_browsing/client_side_detection_service.cc',
         'browser/safe_browsing/client_side_detection_service.h',
         'browser/safe_browsing/database_manager.cc',
         'browser/safe_browsing/database_manager.h',
+        'browser/safe_browsing/download_feedback.cc',
+        'browser/safe_browsing/download_feedback.h',
+        'browser/safe_browsing/download_feedback_service.cc',
+        'browser/safe_browsing/download_feedback_service.h',
         'browser/safe_browsing/download_protection_service.cc',
         'browser/safe_browsing/download_protection_service.h',
         'browser/safe_browsing/malware_details.cc',
         'browser/safe_browsing/malware_details.h',
         'browser/safe_browsing/malware_details_cache.cc',
         'browser/safe_browsing/malware_details_cache.h',
         'browser/safe_browsing/malware_details_history.cc',
         'browser/safe_browsing/malware_details_history.h',
         'browser/safe_browsing/ping_manager.cc',
         'browser/safe_browsing/ping_manager.h',
@@ skipping 1553 matching lines @@
             'package_name': 'org/chromium/chrome/browser/ui/toolbar',
             'template_deps': ['browser/ui/toolbar/toolbar_model_security_level_list.h'],
           },
           'includes': [ '../build/android/java_cpp_template.gypi' ],
         },
       ],
      },
     ],
   ],
 }