Change effect of flag kDisableAcceleratedVideoDecode to only affect decode

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 41e937be5623578c8d7dee08949979b156ab3062..ef0b0b800a37cf7aa38283dce8e03d002d18453c 100644
--- a/content/renderer/media/webrtc/peer_connection_dependency_factory.cc
+++ b/content/renderer/media/webrtc/peer_connection_dependency_factory.cc
@@ -235,9 +235,11 @@ void PeerConnectionDependencyFactory::InitializeSignalingThread(
   std::unique_ptr<cricket::WebRtcVideoEncoderFactory> encoder_factory;
 
   const base::CommandLine* cmd_line = base::CommandLine::ForCurrentProcess();
-  if (gpu_factories && gpu_factories->IsGpuVideoAcceleratorEnabled()) {
-    if (!cmd_line->HasSwitch(switches::kDisableWebRtcHWDecoding))
+  if (gpu_factories) {
+    if (gpu_factories->IsGpuVideoDecodeAcceleratorEnabled() &&
+        !cmd_line->HasSwitch(switches::kDisableWebRtcHWDecoding)) {
       decoder_factory.reset(new RTCVideoDecoderFactory(gpu_factories));
+    }
 
     if (!cmd_line->HasSwitch(switches::kDisableWebRtcHWEncoding)) {
       encoder_factory.reset(new RTCVideoEncoderFactory(gpu_factories));