Add EncodedImageCallback::OnEncodedImage().

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 9f73f36e5d6e5e153ff13c5db2a365bfdc28ae07..9b5d2e62eb29814e555342fe4817491b00b4ab4c 100644
--- a/webrtc/modules/video_coding/generic_encoder.h
+++ b/webrtc/modules/video_coding/generic_encoder.h
@@ -41,9 +41,10 @@ class VCMEncodedFrameCallback : public EncodedImageCallback {
   virtual ~VCMEncodedFrameCallback();
 
   // Implements EncodedImageCallback.
-  int32_t Encoded(const EncodedImage& encoded_image,
-                  const CodecSpecificInfo* codec_specific,
-                  const RTPFragmentationHeader* fragmentation_header) override;
+  EncodedImageCallback::Result OnEncodedImage(
+      const EncodedImage& encoded_image,
+      const CodecSpecificInfo* codec_specific_info,
+      const RTPFragmentationHeader* fragmentation) override;
   void SetInternalSource(bool internal_source) {
     internal_source_ = internal_source;
   }