libvpx: Pull from upstream

source/libvpx/test/decode_test_driver.h

Index: source/libvpx/test/decode_test_driver.h
===================================================================
--- source/libvpx/test/decode_test_driver.h	(revision 284462)
+++ source/libvpx/test/decode_test_driver.h	(working copy)
@@ -91,10 +91,12 @@
         &decoder_, cb_get, cb_release, user_priv);
   }
 
-  const char* GetDecoderName() {
+  const char* GetDecoderName() const {
     return vpx_codec_iface_name(CodecInterface());
   }
 
+  bool IsVP8() const;
+
  protected:
   virtual vpx_codec_iface_t* CodecInterface() const = 0;
 
@@ -138,6 +140,11 @@
   virtual void DecompressedFrameHook(const vpx_image_t& img,
                                      const unsigned int frame_number) {}
 
+  // Hook to be called on peek result
+  virtual void HandlePeekResult(Decoder* const decoder,
+                                CompressedVideoSource *video,
+                                const vpx_codec_err_t res_peek);
+
  protected:
   explicit DecoderTest(const CodecFactory *codec) : codec_(codec) {}