Merge changes I86b21186,Ifde2849f,Ic53cdb8c,Id3db2ae8,Iba3c63cd,I744342b1,I627dc800...

* changes:
  resize_test.cc: remove unused param warnings
  invalid_file_test.cc: remove unused param warnings
  fdct8x8_test.cc: remove unused param warnings
  fdct4x4_test.cc: remove unused param warnings
  tests/reference_32x32_dct_1d: remove unused stride param
  dct16x16_test.cc: remove unused param warnings
  datarate_test.cc: remove unused param warnings
  frame_size_tests.cc: remove unused param warnings
  encode_test_driver.cc: remove unused param warnings
  encode_test_driver.h: remove unused param warnings
  decode_test_driver.h: remove unused param warnings