Fail playback when VideoDecoderConfig has invalid extra data.

Invalid extra data occurs when:
  (extra_data_ptr == NULL) != (extra_data_size == 0)

We were previously crashing (CHECK) on this condition.
{Audio|Video}DecoderConfig now use a vector and pointer/size issues
are detected/handled in the path of creating the FFmpegDemuxerStream.

Skipping presubmit due to formatting issues. I'd like to have some hope of merging this back to dev.

NOPRESUBMIT=true
BUG=517163
TEST=New unit test. Manually verified graceful failure for MSE & SRC=
R=bbudge@chromium.org, gunsch@chromium.org, sandersd@chromium.org, xhwang@chromium.org

Review URL: https://codereview.chromium.org/1396583002

Cr-Commit-Position: refs/heads/master@{#354952}

• chromecast/common/media/cma_param_traits.cc[diff]
• chromecast/media/audio/cast_audio_output_stream.cc[diff]
• chromecast/media/cma/base/decoder_config_adapter.cc[diff]
• chromecast/media/cma/ipc_streamer/audio_decoder_config_marshaller.cc[diff]
• chromecast/media/cma/ipc_streamer/video_decoder_config_marshaller.cc[diff]
• chromecast/media/cma/pipeline/audio_video_pipeline_impl_unittest.cc[diff]
• chromecast/media/cma/test/mock_frame_provider.cc[diff]
• chromecast/renderer/media/demuxer_stream_for_test.cc[diff]
• content/common/gpu/media/video_encode_accelerator_unittest.cc[diff]
• content/renderer/media/android/media_source_delegate.cc[diff]
• content/renderer/pepper/content_decryptor_delegate.cc[diff]
• content/renderer/pepper/video_decoder_shim.cc[diff]
• media/base/BUILD.gn[diff]
• media/base/audio_decoder_config.cc[diff]
• media/base/audio_decoder_config.h[diff]
• media/base/fake_demuxer_stream.cc[diff]
• media/base/media_util.cc[Added - diff]
• media/base/media_util.h[Added - diff]
• media/base/test_helpers.cc[diff]
• media/base/video_decoder_config.cc[diff]
• media/base/video_decoder_config.h[diff]
• media/base/video_decoder_config_unittest.cc[diff]
• media/cast/sender/h264_vt_encoder_unittest.cc[diff]
• media/ffmpeg/ffmpeg_common.cc[diff]
• media/ffmpeg/ffmpeg_common.h[diff]
• media/ffmpeg/ffmpeg_common_unittest.cc[diff]
• media/filters/audio_decoder_selector_unittest.cc[diff]
• media/filters/audio_decoder_unittest.cc[diff]
• media/filters/chunk_demuxer_unittest.cc[diff]
• media/filters/decrypting_audio_decoder_unittest.cc[diff]
• media/filters/decrypting_demuxer_stream.cc[diff]
• media/filters/decrypting_demuxer_stream_unittest.cc[diff]
• media/filters/ffmpeg_demuxer.cc[diff]
• media/filters/ffmpeg_demuxer.h[diff]
• media/filters/ffmpeg_demuxer_unittest.cc[diff]
• media/filters/ffmpeg_glue.cc[diff]
• media/filters/ffmpeg_video_decoder_unittest.cc[diff]
• media/filters/frame_processor_unittest.cc[diff]
• media/filters/opus_audio_decoder.cc[diff]
• media/filters/source_buffer_stream_unittest.cc[diff]
• media/formats/mp2t/es_adapter_video_unittest.cc[diff]
• media/formats/mp2t/es_parser_adts.cc[diff]
• media/formats/mp2t/es_parser_h264.cc[diff]
• media/formats/mp2t/es_parser_mpeg1audio.cc[diff]
• media/formats/mp4/mp4_stream_parser.cc[diff]
• media/formats/mpeg/mpeg_audio_stream_parser_base.cc[diff]
• media/formats/webm/webm_audio_client.cc[diff]
• media/formats/webm/webm_video_client.cc[diff]
• media/media.gyp[diff]
• media/mojo/services/media_type_converters.cc[diff]
• media/mojo/services/media_type_converters_unittest.cc[diff]
• media/renderers/audio_renderer_impl_unittest.cc[diff]