Add EncodedImageCallback::OnEncodedImage().

webrtc/modules/video_coding/codecs/vp8/simulcast_encoder_adapter_unittest.cc

Index: webrtc/modules/video_coding/codecs/vp8/simulcast_encoder_adapter_unittest.cc
diff --git a/webrtc/modules/video_coding/codecs/vp8/simulcast_encoder_adapter_unittest.cc b/webrtc/modules/video_coding/codecs/vp8/simulcast_encoder_adapter_unittest.cc
index 89c61cec3af9b84b507c23c27405f96544e420f4..2e3a7a10701b4a6fb91af4c4bec0fae5649101ac 100644
--- a/webrtc/modules/video_coding/codecs/vp8/simulcast_encoder_adapter_unittest.cc
+++ b/webrtc/modules/video_coding/codecs/vp8/simulcast_encoder_adapter_unittest.cc
@@ -247,16 +247,16 @@ class TestSimulcastEncoderAdapterFake : public ::testing::Test,
         last_encoded_image_simulcast_index_(-1) {}
   virtual ~TestSimulcastEncoderAdapterFake() {}
 
-  int32_t Encoded(const EncodedImage& encodedImage,
-                  const CodecSpecificInfo* codecSpecificInfo = NULL,
-                  const RTPFragmentationHeader* fragmentation = NULL) override {
-    last_encoded_image_width_ = encodedImage._encodedWidth;
-    last_encoded_image_height_ = encodedImage._encodedHeight;
-    if (codecSpecificInfo) {
+  Result OnEncodedImage(const EncodedImage& encoded_image,
+                        const CodecSpecificInfo* codec_specific_info,
+                        const RTPFragmentationHeader* fragmentation) override {
+    last_encoded_image_width_ = encoded_image._encodedWidth;
+    last_encoded_image_height_ = encoded_image._encodedHeight;
+    if (codec_specific_info) {
       last_encoded_image_simulcast_index_ =
-          codecSpecificInfo->codecSpecific.VP8.simulcastIdx;
+          codec_specific_info->codecSpecific.VP8.simulcastIdx;
     }
-    return 0;
+    return Result();
   }
 
   bool GetLastEncodedImageInfo(int* out_width,