Add ability to instantiate VideoEncoderSoftwareFallback in VP tests.

webrtc/modules/video_coding/codecs/test/videoprocessor_integrationtest_openh264.cc

Index: webrtc/modules/video_coding/codecs/test/videoprocessor_integrationtest_openh264.cc
diff --git a/webrtc/modules/video_coding/codecs/test/videoprocessor_integrationtest_openh264.cc b/webrtc/modules/video_coding/codecs/test/videoprocessor_integrationtest_openh264.cc
index e4c60e737cc759569bff3fb14ca4ecda197d11b8..a5f82619de58f192922bf65b06ae71b9995f1095 100644
--- a/webrtc/modules/video_coding/codecs/test/videoprocessor_integrationtest_openh264.cc
+++ b/webrtc/modules/video_coding/codecs/test/videoprocessor_integrationtest_openh264.cc
@@ -43,7 +43,8 @@ class VideoProcessorIntegrationTestOpenH264
     // Only allow encoder/decoder to use single core, for predictability.
     config_.use_single_core = true;
     config_.verbose = false;
-    config_.hw_codec = false;
+    config_.hw_encoder = false;
+    config_.hw_decoder = false;
   }
 };