Reland of Modify profiles for H264 encode SW fallback

webrtc/media/engine/videoencodersoftwarefallbackwrapper.h

 /*
  *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 59 matching lines @@
     int64_t min_low_ms = 10000;
     const int kMaxPixelsStart = 320 * 240;
     const int kMinPixelsStop = 320 * 180;
   };
 
   bool RequestForcedFallback();
   bool TryReleaseForcedFallbackEncoder();
   bool TryReInitForcedFallbackEncoder();
   void ValidateSettingsForForcedFallback();
   bool IsForcedFallbackActive() const;
+  void MaybeModifyCodecForFallback();
 
   // Settings used in the last InitEncode call and used if a dynamic fallback to
   // software is required.
   VideoCodec codec_settings_;
   int32_t number_of_cores_;
   size_t max_payload_size_;
 
   // The last bitrate/framerate set, and a flag for noting they are set.
   bool rates_set_;
   BitrateAllocation bitrate_allocation_;
   uint32_t framerate_;
 
   // The last channel parameters set, and a flag for noting they are set.
   bool channel_parameters_set_;
   uint32_t packet_loss_;
   int64_t rtt_;
 
-  const cricket::VideoCodec codec_;
+  cricket::VideoCodec codec_;
   webrtc::VideoEncoder* const encoder_;
 
   std::unique_ptr<webrtc::VideoEncoder> fallback_encoder_;
   std::string fallback_implementation_name_;
   EncodedImageCallback* callback_;
 
   bool forced_fallback_possible_;
   ForcedFallbackParams forced_fallback_;
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_MEDIA_ENGINE_VIDEOENCODERSOFTWAREFALLBACKWRAPPER_H_