media/gpu/video_encode_accelerator_tests: Specify the proper bitrate in MultipleOutstandingEncodes

The bitrate is not specified in MultipleOutstandingEncodes case.
So the default bitrate is used. It causes a failure in higher
resolutions because of the bad stream quality. This fixed the
issue. This also removes the default argument value to the
bitrate argument in order to refrain this bug.

Bug: 1045825
Test: video_encode_accelerator_tests on atlas
Change-Id: I9c638db22175a7bc0573868fadc2057ec34bbdb9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2371903
Commit-Queue: Hirokazu Honda <hiroh@chromium.org>
Auto-Submit: Hirokazu Honda <hiroh@chromium.org>
Reviewed-by: David Staessens <dstaessens@chromium.org>
Cr-Commit-Position: refs/heads/master@{#801324}

media/gpu/test/video_encoder/video_encoder_client.h

@@ -37,7 +37,7 @@ struct VideoEncoderClientConfig {
   static constexpr uint32_t kDefaultBitrate = 200000;
   VideoEncoderClientConfig(const Video* video,
                            VideoCodecProfile output_profile,
-                           uint32_t bitrate = kDefaultBitrate);
+                           uint32_t bitrate);
   VideoEncoderClientConfig(const VideoEncoderClientConfig&);
 
   // The output output profile to be used.

media/gpu/video_encode_accelerator_tests.cc

@@ -252,8 +252,9 @@ TEST_F(VideoEncoderTest, DestroyBeforeInitialize) {
 
 // Encode video from start to end. Multiple buffer encodes will be queued in the
 // encoder, without waiting for the result of the previous encode requests.
-TEST_F(VideoEncoderTest, FlushAtEndOfStream_MultipleOutstandingDecodes) {
-  VideoEncoderClientConfig config(g_env->Video(), g_env->Profile());
+TEST_F(VideoEncoderTest, FlushAtEndOfStream_MultipleOutstandingEncodes) {
+  VideoEncoderClientConfig config(g_env->Video(), g_env->Profile(),
+                                  g_env->Bitrate());
   config.max_outstanding_encode_requests = 4;
   auto encoder = CreateVideoEncoder(g_env->Video(), config);