Add ability to instantiate VideoEncoderSoftwareFallback in VP tests.

webrtc/modules/video_coding/codecs/test/plot_videoprocessor_integrationtest.cc

 /*
  *  Copyright (c) 2017 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.
  */
 
@@ skipping 45 matching lines @@
   void RunTest(int width,
                int height,
                int framerate,
                const std::string& filename) {
     config_.filename = filename;
     config_.input_filename = ResourcePath(filename, "yuv");
     config_.output_filename =
         TempFilename(OutputPath(), "plot_videoprocessor_integrationtest");
     config_.use_single_core = kUseSingleCore;
     config_.verbose = true;
-    config_.hw_codec = hw_codec_;
+    config_.hw_encoder = hw_codec_;
+    config_.hw_decoder = hw_codec_;
     SetCodecSettings(&config_, codec_type_, kNumTemporalLayers,
                      kErrorConcealmentOn, kDenoisingOn, kFrameDropperOn,
                      kSpatialResizeOn, kResilienceOn, width, height);
 
     RateProfile rate_profile;
     SetRateProfile(&rate_profile,
                    0,  // update_index
                    bitrate_, framerate,
                    0);  // frame_index_rate_update
     rate_profile.frame_index_rate_update[1] = kNumFrames + 1;
@@ skipping 30 matching lines @@
 TEST_P(PlotVideoProcessorIntegrationTest, Process_320x240_30fps) {
   RunTest(320, 240, 30, "foreman_320x240");
 }
 
 TEST_P(PlotVideoProcessorIntegrationTest, Process_352x288_30fps) {
   RunTest(352, 288, 30, "foreman_cif");
 }
 
 }  // namespace test
 }  // namespace webrtc