Fix use of scaler in MediaCodecVideoEncoder

This bug fixes an issue introduced in https://codereview.webrtc.org/1396073003/

BUG=webrtc:5067
TEST= set new_bit_rate = 200 in MediaCodecVideoEncoder::SetRatesOnCodecThread and compile and run ApprtDemo
R=magjed@webrtc.org

Review URL: https://codereview.webrtc.org/1401943002 .

Cr-Commit-Position: refs/heads/master@{#10263}
diff --git a/talk/app/webrtc/java/jni/androidmediaencoder_jni.cc b/talk/app/webrtc/java/jni/androidmediaencoder_jni.cc
index 8fcc20b..246773c 100644
--- a/talk/app/webrtc/java/jni/androidmediaencoder_jni.cc
+++ b/talk/app/webrtc/java/jni/androidmediaencoder_jni.cc
@@ -543,7 +543,7 @@
   const VideoFrame& input_frame =
       scale_ ? quality_scaler_.GetScaledFrame(frame) : frame;
 
-  if (!MaybeReconfigureEncoderOnCodecThread(frame)) {
+  if (!MaybeReconfigureEncoderOnCodecThread(input_frame)) {
     ALOGE << "Failed to reconfigure encoder.";
     return WEBRTC_VIDEO_CODEC_ERROR;
   }