Add optional visualization file writers to VideoProcessor tests.

webrtc/modules/video_coding/BUILD.gn

 # Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
 #
 # Use of this source code is governed by a BSD-style license
 # that can be found in the LICENSE file in the root of the source
 # tree. An additional intellectual property rights grant can be found
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
 import("../../webrtc.gni")
 
@@ skipping 333 matching lines @@
   rtc_source_set("video_coding_videoprocessor_integration_test") {
     testonly = true
 
     sources = [
       "codecs/test/videoprocessor_integrationtest.h",
     ]
 
     deps = [
       ":video_codecs_test_framework",
       ":video_coding",
+      ":video_coding_utility",
       ":webrtc_h264",
       ":webrtc_vp8",
       ":webrtc_vp9",
       "../..:webrtc_common",
       "../../base:rtc_base_approved",
       "../../media:rtc_media",
       "../../test:test_support",
       "../../test:video_test_support",
     ]
 
@@ skipping 194 matching lines @@
     }
 
     # TODO(jschuh): bugs.webrtc.org/1348: fix this warning.
     configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
     if (!build_with_chromium && is_clang) {
       # Suppress warnings from the Chromium Clang plugin (bugs.webrtc.org/163).
       suppressed_configs += [ "//build/config/clang:find_bad_constructs" ]
     }
   }
 }