Remove GetOutputScaling from VoiceMediaChannel.

talk/media/base/fakemediaengine.h

Index: talk/media/base/fakemediaengine.h
diff --git a/talk/media/base/fakemediaengine.h b/talk/media/base/fakemediaengine.h
index 2c579e29375ed4d8e6c2fb91c37c1ec3bf517a98..de6062b5d4f713f4a7c99ccf0456f2ea35da8a1d 100644
--- a/talk/media/base/fakemediaengine.h
+++ b/talk/media/base/fakemediaengine.h
@@ -384,7 +384,7 @@ class FakeVoiceMediaChannel : public RtpHelper<VoiceMediaChannel> {
     }
     return false;
   }
-  virtual bool GetOutputScaling(uint32 ssrc, double* left, double* right) {
+  bool GetOutputScaling(uint32 ssrc, double* left, double* right) {
     if (output_scalings_.find(ssrc) == output_scalings_.end())
       return false;
     *left = output_scalings_[ssrc].left;