Only allow webrtc HW offload for H264 encode for extension process.

content/renderer/media/rtc_video_encoder_factory.cc

Index: content/renderer/media/rtc_video_encoder_factory.cc
diff --git a/content/renderer/media/rtc_video_encoder_factory.cc b/content/renderer/media/rtc_video_encoder_factory.cc
index f30b6260cecbeb2df287dad58f0aa7c2331d94a0..d4a545741cb327ac8910015110d853f57923b628 100644
--- a/content/renderer/media/rtc_video_encoder_factory.cc
+++ b/content/renderer/media/rtc_video_encoder_factory.cc
@@ -4,8 +4,10 @@
 
 #include "content/renderer/media/rtc_video_encoder_factory.h"
 
+#include "base/command_line.h"
 #include "content/common/gpu/client/gpu_video_encode_accelerator_host.h"
 #include "content/renderer/media/rtc_video_encoder.h"
+#include "extensions/common/switches.h"
 #include "media/filters/gpu_video_accelerator_factories.h"
 #include "media/video/video_encode_accelerator.h"
 
@@ -13,6 +15,11 @@ namespace content {
 
 namespace {
 
+bool IsExtensionProcess() {
+  return CommandLine::ForCurrentProcess()->HasSwitch(
+      extensions::switches::kExtensionProcess);
+}
+
 // Translate from media::VideoEncodeAccelerator::SupportedProfile to
 // one or more instances of cricket::WebRtcVideoEncoderFactory::VideoCodec
 std::vector<cricket::WebRtcVideoEncoderFactory::VideoCodec> VEAToWebRTCCodecs(
@@ -31,8 +38,10 @@ std::vector<cricket::WebRtcVideoEncoderFactory::VideoCodec> VEAToWebRTCCodecs(
              profile.profile <= media::H264PROFILE_MAX) {
     codecs.push_back(cricket::WebRtcVideoEncoderFactory::VideoCodec(
         webrtc::kVideoCodecGeneric, "CAST1", width, height, fps));
-    codecs.push_back(cricket::WebRtcVideoEncoderFactory::VideoCodec(
-        webrtc::kVideoCodecH264, "H264", width, height, fps));
+    if (IsExtensionProcess()) {
+      codecs.push_back(cricket::WebRtcVideoEncoderFactory::VideoCodec(
+          webrtc::kVideoCodecH264, "H264", width, height, fps));
+    }
   }
 
   return codecs;