[Cast] Make decoder_config.h usable without decoder_config_adapter.cc

chromecast/media/cma/base/decoder_config_adapter.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chromecast/media/cma/base/decoder_config_adapter.h"
 
 #include "base/logging.h"
 #include "chromecast/media/base/media_codec_support.h"
 #include "media/base/channel_layout.h"
 
@@ skipping 253 matching lines @@
     mm2.primary_b_chromaticity_y = mm1.primary_b_chromaticity_y;
     mm2.white_point_chromaticity_x = mm1.white_point_chromaticity_x;
     mm2.white_point_chromaticity_y = mm1.white_point_chromaticity_y;
     mm2.luminance_max = mm1.luminance_max;
     mm2.luminance_min = mm1.luminance_min;
   }
 
   return video_config;
 }
 
-MasteringMetadata::MasteringMetadata() {}
-MasteringMetadata::MasteringMetadata(const MasteringMetadata& rhs) = default;
-
-HDRMetadata::HDRMetadata() {}
-HDRMetadata::HDRMetadata(const HDRMetadata& rhs) = default;
-
 // Ensure that Chromecast enum values match enums in gfx::ColorSpace.
 #define STATIC_ASSERT_ENUM(a, b)                                             \
   static_assert(static_cast<int>(a) == static_cast<int>(gfx::ColorSpace::b), \
                 "mismatching enums: " #a " and " #b)
 
 STATIC_ASSERT_ENUM(PrimaryID::RESERVED0, PrimaryID::RESERVED0);
 STATIC_ASSERT_ENUM(PrimaryID::BT709, PrimaryID::BT709);
 STATIC_ASSERT_ENUM(PrimaryID::UNSPECIFIED, PrimaryID::UNSPECIFIED);
 STATIC_ASSERT_ENUM(PrimaryID::RESERVED, PrimaryID::RESERVED);
 STATIC_ASSERT_ENUM(PrimaryID::BT470M, PrimaryID::BT470M);
@@ skipping 39 matching lines @@
 STATIC_ASSERT_ENUM(MatrixID::BT2020_NCL, MatrixID::BT2020_NCL);
 STATIC_ASSERT_ENUM(MatrixID::BT2020_CL, MatrixID::BT2020_CL);
 
 STATIC_ASSERT_ENUM(RangeID::UNSPECIFIED, RangeID::UNSPECIFIED);
 STATIC_ASSERT_ENUM(RangeID::LIMITED, RangeID::LIMITED);
 STATIC_ASSERT_ENUM(RangeID::FULL, RangeID::FULL);
 STATIC_ASSERT_ENUM(RangeID::DERIVED, RangeID::DERIVED);
 
 }  // namespace media
 }  // namespace chromecast