RtcVideoEncoder: determine video codec profile at InitEncode time.

content/renderer/media/rtc_video_encoder.h

Index: content/renderer/media/rtc_video_encoder.h
diff --git a/content/renderer/media/rtc_video_encoder.h b/content/renderer/media/rtc_video_encoder.h
index 43852ef66a3bbf7dfe5b8acf8ddb18d311976095..5f0f59ac0810b49c7427817ec2eb711b441a6e81 100644
--- a/content/renderer/media/rtc_video_encoder.h
+++ b/content/renderer/media/rtc_video_encoder.h
@@ -47,7 +47,6 @@ class CONTENT_EXPORT RTCVideoEncoder
  public:
   RTCVideoEncoder(
       webrtc::VideoCodecType type,
-      media::VideoCodecProfile profile,
       const scoped_refptr<media::GpuVideoAcceleratorFactories>& gpu_factories);
   virtual ~RTCVideoEncoder();
 
@@ -77,16 +76,14 @@ class CONTENT_EXPORT RTCVideoEncoder
 
   void NotifyError(int32_t error);
 
-  void RecordInitEncodeUMA(int32_t init_retval);
+  void RecordInitEncodeUMA(int32_t init_retval,
+                           media::VideoCodecProfile profile);
 
   base::ThreadChecker thread_checker_;
 
   // The video codec type, as reported to WebRTC.
   const webrtc::VideoCodecType video_codec_type_;
 
-  // The video codec profile, to configure the encoder to encode to.
-  const media::VideoCodecProfile video_codec_profile_;
-
   // Factory for creating VEAs, shared memory buffers, etc.
   scoped_refptr<media::GpuVideoAcceleratorFactories> gpu_factories_;