Use FakeRenderer when fuzzing

Do not fuzz with real renderer because it is merely frame copying and
doesn't exercise different control flows. This CL also improved fuzzing
performance and fixed a memory leak.

Bug: chromium:952606, chromium:1009077, chromium:1009073
Change-Id: I77c6f2581db82bfd95edb18e5f0e541a94c78208
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/156620
Commit-Queue: Benjamin Wright <benwright@webrtc.org>
Reviewed-by: Benjamin Wright <benwright@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#29522}

test/fuzzers/utils/BUILD.gn

@@ -35,7 +35,7 @@ rtc_source_set("rtp_replayer") {
     "../../../test:rtp_test_utils",
     "../../../test:run_test",
     "../../../test:run_test_interface",
-    "../../../test:test_renderer",
+    "../../../test:test_common",
     "../../../test:test_support",
     "../../../test:video_test_common",
   ]

test/fuzzers/utils/rtp_replayer.cc

@@ -21,6 +21,7 @@
 #include "test/call_config_utils.h"
 #include "test/encoder_settings.h"
 #include "test/fake_decoder.h"
+#include "test/fake_videorenderer.h"
 #include "test/rtp_file_reader.h"
 #include "test/rtp_header_parser.h"
 
@@ -111,9 +112,7 @@ void RtpReplayer::SetupVideoStreams(
       decoder.decoder_factory = stream_state->decoder_factory.get();
     }
 
-    // Create the window to display the rendered video.
-    stream_state->sinks.emplace_back(
-        test::VideoRenderer::Create("Fuzzing WebRTC Video Config", 640, 480));
+    stream_state->sinks.emplace_back(new test::FakeVideoRenderer());
     // Create a receive stream for this config.
     receive_config.renderer = stream_state->sinks.back().get();
     stream_state->receive_streams.emplace_back(

test/fuzzers/utils/rtp_replayer.h

@@ -28,7 +28,6 @@
 #include "test/null_transport.h"
 #include "test/rtp_file_reader.h"
 #include "test/test_video_capturer.h"
-#include "test/video_renderer.h"
 
 namespace webrtc {
 namespace test {