Android: enable WebRTC HW H264 with a flag by default

content/renderer/media/webrtc/peer_connection_dependency_factory.cc

Index: content/renderer/media/webrtc/peer_connection_dependency_factory.cc
diff --git a/content/renderer/media/webrtc/peer_connection_dependency_factory.cc b/content/renderer/media/webrtc/peer_connection_dependency_factory.cc
index f503eebadc43a48e943c7a61a8e4cd1a07221f98..54cbbb0c7bd3d17b2aaafe1bd08b437b2a2731c5 100644
--- a/content/renderer/media/webrtc/peer_connection_dependency_factory.cc
+++ b/content/renderer/media/webrtc/peer_connection_dependency_factory.cc
@@ -24,6 +24,7 @@
 #include "build/build_config.h"
 #include "content/common/media/media_stream_messages.h"
 #include "content/public/common/content_client.h"
+#include "content/public/common/content_features.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/common/feature_h264_with_openh264_ffmpeg.h"
 #include "content/public/common/features.h"
@@ -239,8 +240,7 @@ void PeerConnectionDependencyFactory::InitializeSignalingThread(
       decoder_factory.reset(new RTCVideoDecoderFactory(gpu_factories));
 
     if (!cmd_line->HasSwitch(switches::kDisableWebRtcHWEncoding) ||
-        !cmd_line->GetSwitchValueASCII(switches::kDisableWebRtcHWEncoding)
-             .empty()) {
+        base::FeatureList::IsEnabled(features::kWebRtcHWH264EncodingAndroid)) {
       encoder_factory.reset(new RTCVideoEncoderFactory(gpu_factories));
     }
   }