libvpx: Pull from upstream

source/libvpx/test/idct8x8_test.cc

Index: source/libvpx/test/idct8x8_test.cc
diff --git a/source/libvpx/test/idct8x8_test.cc b/source/libvpx/test/idct8x8_test.cc
index 987ba7536fcd95a303d7ad783f6dc16ff351c127..7f9d751d650a3ac471553285e96e359f1432e40b 100644
--- a/source/libvpx/test/idct8x8_test.cc
+++ b/source/libvpx/test/idct8x8_test.cc
@@ -67,43 +67,6 @@ void reference_dct_2d(int16_t input[64], double output[64]) {
     output[i] *= 2;
 }
 
-void reference_idct_1d(double input[8], double output[8]) {
-  const double kPi = 3.141592653589793238462643383279502884;
-  const double kSqrt2 = 1.414213562373095048801688724209698;
-  for (int k = 0; k < 8; k++) {
-    output[k] = 0.0;
-    for (int n = 0; n < 8; n++) {
-      output[k] += input[n]*cos(kPi*(2*k+1)*n/16.0);
-      if (n == 0)
-        output[k] = output[k]/kSqrt2;
-    }
-  }
-}
-
-void reference_idct_2d(double input[64], int16_t output[64]) {
-  double out[64], out2[64];
-  // First transform rows
-  for (int i = 0; i < 8; ++i) {
-    double temp_in[8], temp_out[8];
-    for (int j = 0; j < 8; ++j)
-      temp_in[j] = input[j + i*8];
-    reference_idct_1d(temp_in, temp_out);
-    for (int j = 0; j < 8; ++j)
-      out[j + i*8] = temp_out[j];
-  }
-  // Then transform columns
-  for (int i = 0; i < 8; ++i) {
-    double temp_in[8], temp_out[8];
-    for (int j = 0; j < 8; ++j)
-      temp_in[j] = out[j*8 + i];
-    reference_idct_1d(temp_in, temp_out);
-    for (int j = 0; j < 8; ++j)
-      out2[j*8 + i] = temp_out[j];
-  }
-  for (int i = 0; i < 64; ++i)
-    output[i] = round(out2[i]/32);
-}
-
 TEST(VP9Idct8x8Test, AccuracyCheck) {
   ACMRandom rnd(ACMRandom::DeterministicSeed());
   const int count_test_block = 10000;