Add rotation to EncodedImage and make sure it is passed through encoders.

webrtc/modules/video_coding/generic_encoder.h

Index: webrtc/modules/video_coding/generic_encoder.h
diff --git a/webrtc/modules/video_coding/generic_encoder.h b/webrtc/modules/video_coding/generic_encoder.h
index e96d99578150f7b531445e14cb35f46995070801..9c9693df17ab9ab1ba920a7f6c8eba024aed2290 100644
--- a/webrtc/modules/video_coding/generic_encoder.h
+++ b/webrtc/modules/video_coding/generic_encoder.h
@@ -66,7 +66,6 @@ class VCMEncodedFrameCallback : public EncodedImageCallback {
       _internalSource = internalSource;
     }
 
-    void SetRotation(VideoRotation rotation) { _rotation = rotation; }
     void SignalLastEncoderImplementationUsed(
         const char* encoder_implementation_name);
 
@@ -75,7 +74,6 @@ class VCMEncodedFrameCallback : public EncodedImageCallback {
     media_optimization::MediaOptimization* _mediaOpt;
     uint8_t _payloadType;
     bool _internalSource;
-    VideoRotation _rotation;
 
     EncodedImageCallback* post_encode_callback_;