Moved media mime type and codec checks to media/base/mime_util.*

net/base/mime_util.cc

 // Copyright (c) 2012 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 <algorithm>
 #include <iterator>
 #include <map>
 #include <string>
 
 #include "base/containers/hash_tables.h"
 #include "base/lazy_instance.h"
 #include "base/logging.h"
 #include "base/stl_util.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_split.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "net/base/mime_util.h"
 #include "net/base/platform_mime_util.h"
 #include "net/http/http_util.h"
 
-#if defined(OS_ANDROID)
-#include "base/android/build_info.h"
-#endif
-
 using std::string;
 
 namespace net {
 
 // Singleton utility class for mime types.
 class MimeUtil : public PlatformMimeUtil {
  public:
-  enum Codec {
-    INVALID_CODEC,
-    PCM,
-    MP3,
-    MPEG2_AAC_LC,
-    MPEG2_AAC_MAIN,
-    MPEG2_AAC_SSR,
-    MPEG4_AAC_LC,
-    MPEG4_AAC_SBR_v1,
-    MPEG4_AAC_SBR_PS_v2,
-    VORBIS,
-    OPUS,
-    H264_BASELINE,
-    H264_MAIN,
-    H264_HIGH,
-    VP8,
-    VP9,
-    THEORA
-  };
-
   bool GetMimeTypeFromExtension(const base::FilePath::StringType& ext,
                                 std::string* mime_type) const;
 
   bool GetMimeTypeFromFile(const base::FilePath& file_path,
                            std::string* mime_type) const;
 
   bool GetWellKnownMimeTypeFromExtension(const base::FilePath::StringType& ext,
                                          std::string* mime_type) const;
 
-  bool IsSupportedMediaMimeType(const std::string& mime_type) const;
-
   bool MatchesMimeType(const std::string &mime_type_pattern,
                        const std::string &mime_type) const;
 
   bool ParseMimeTypeWithoutParameter(const std::string& type_string,
                                      std::string* top_level_type,
                                      std::string* subtype) const;
 
   bool IsValidTopLevelMimeType(const std::string& type_string) const;
 
-  bool AreSupportedMediaCodecs(const std::vector<std::string>& codecs) const;
-
-  void ParseCodecString(const std::string& codecs,
-                        std::vector<std::string>* codecs_out,
-                        bool strip);
-
-  bool IsStrictMediaMimeType(const std::string& mime_type) const;
-  SupportsType IsSupportedStrictMediaMimeType(
-      const std::string& mime_type,
-      const std::vector<std::string>& codecs) const;
-
-  void RemoveProprietaryMediaTypesAndCodecsForTests();
-
  private:
   friend struct base::DefaultLazyInstanceTraits<MimeUtil>;
 
-  typedef base::hash_set<std::string> MimeMappings;
-
-  typedef base::hash_set<int> CodecSet;
-  typedef std::map<std::string, CodecSet> StrictMappings;
-  struct CodecEntry {
-    CodecEntry() : codec(INVALID_CODEC), is_ambiguous(true) {}
-    CodecEntry(Codec c, bool ambiguous) : codec(c), is_ambiguous(ambiguous) {}
-    Codec codec;
-    bool is_ambiguous;
-  };
-  typedef std::map<std::string, CodecEntry> StringToCodecMappings;
-
   MimeUtil();
 
-  // Returns IsSupported if all codec IDs in |codecs| are unambiguous
-  // and are supported by the platform. MayBeSupported is returned if
-  // at least one codec ID in |codecs| is ambiguous but all the codecs
-  // are supported by the platform. IsNotSupported is returned if at
-  // least one codec ID  is not supported by the platform.
-  SupportsType AreSupportedCodecs(
-      const CodecSet& supported_codecs,
-      const std::vector<std::string>& codecs) const;
-
-  // For faster lookup, keep hash sets.
-  void InitializeMimeTypeMaps();
-
   bool GetMimeTypeFromExtensionHelper(const base::FilePath::StringType& ext,
                                       bool include_platform_types,
                                       std::string* mime_type) const;
-
-  // Converts a codec ID into an Codec enum value and indicates
-  // whether the conversion was ambiguous.
-  // Returns true if this method was able to map |codec_id| to a specific
-  // Codec enum value. |codec| and |is_ambiguous| are only valid if true
-  // is returned. Otherwise their value is undefined after the call.
-  // |is_ambiguous| is true if |codec_id| did not have enough information to
-  // unambiguously determine the proper Codec enum value. If |is_ambiguous|
-  // is true |codec| contains the best guess for the intended Codec enum value.
-  bool StringToCodec(const std::string& codec_id,
-                     Codec* codec,
-                     bool* is_ambiguous) const;
-
-  // Returns true if |codec| is supported by the platform.
-  // Note: This method will return false if the platform supports proprietary
-  // codecs but |allow_proprietary_codecs_| is set to false.
-  bool IsCodecSupported(Codec codec) const;
-
-  // Returns true if |codec| refers to a proprietary codec.
-  bool IsCodecProprietary(Codec codec) const;
-
-  // Returns true and sets |*default_codec| if |mime_type| has a  default codec
-  // associated with it. Returns false otherwise and the value of
-  // |*default_codec| is undefined.
-  bool GetDefaultCodecLowerCase(const std::string& mime_type_lower_case,
-                                Codec* default_codec) const;
-
-  // Returns true if |mime_type_lower_case| has a default codec associated with
-  // it and IsCodecSupported() returns true for that particular codec.
-  bool IsDefaultCodecSupportedLowerCase(
-      const std::string& mime_type_lower_case) const;
-
-  MimeMappings media_map_;
-
-  // A map of mime_types and hash map of the supported codecs for the mime_type.
-  StrictMappings strict_format_map_;
-
-  // Keeps track of whether proprietary codec support should be
-  // advertised to callers.
-  bool allow_proprietary_codecs_;
-
-  // Lookup table for string compare based string -> Codec mappings.
-  StringToCodecMappings string_to_codec_map_;
 };  // class MimeUtil
 
 // This variable is Leaky because we need to access it from WorkerPool threads.
 static base::LazyInstance<MimeUtil>::Leaky g_mime_util =
     LAZY_INSTANCE_INITIALIZER;
 
 struct MimeInfo {
   const char* const mime_type;
   const char* const extensions;  // comma separated list
 };
@@ skipping 119 matching lines @@
   mime_type = FindMimeType(secondary_mappings, arraysize(secondary_mappings),
                            ext_narrow_str.c_str());
   if (mime_type) {
     *result = mime_type;
     return true;
   }
 
   return false;
 }
 
-// A list of media types: http://en.wikipedia.org/wiki/Internet_media_type
-// A comprehensive mime type list: http://plugindoc.mozdev.org/winmime.php
-// This set of codecs is supported by all variations of Chromium.
-static const char* const common_media_types[] = {
-  // Ogg.
-  "audio/ogg",
-  "application/ogg",
-#if !defined(OS_ANDROID)  // Android doesn't support Ogg Theora.
-  "video/ogg",
-#endif
-
-  // WebM.
-  "video/webm",
-  "audio/webm",
-
-  // Wav.
-  "audio/wav",
-  "audio/x-wav",
-
-#if defined(OS_ANDROID)
-  // HLS.
-  "application/vnd.apple.mpegurl",
-  "application/x-mpegurl",
-#endif
-};
-
-// List of proprietary types only supported by Google Chrome.
-static const char* const proprietary_media_types[] = {
-  // MPEG-4.
-  "video/mp4",
-  "video/x-m4v",
-  "audio/mp4",
-  "audio/x-m4a",
-
-  // MP3.
-  "audio/mp3",
-  "audio/x-mp3",
-  "audio/mpeg",
-  "audio/aac",
-
-#if defined(ENABLE_MPEG2TS_STREAM_PARSER)
-  // MPEG-2 TS.
-  "video/mp2t",
-#endif
-};
-
-#if defined(OS_ANDROID)
-static bool IsCodecSupportedOnAndroid(MimeUtil::Codec codec) {
-  switch (codec) {
-    case MimeUtil::INVALID_CODEC:
-      return false;
-
-    case MimeUtil::PCM:
-    case MimeUtil::MP3:
-    case MimeUtil::MPEG4_AAC_LC:
-    case MimeUtil::MPEG4_AAC_SBR_v1:
-    case MimeUtil::MPEG4_AAC_SBR_PS_v2:
-    case MimeUtil::H264_BASELINE:
-    case MimeUtil::H264_MAIN:
-    case MimeUtil::H264_HIGH:
-    case MimeUtil::VP8:
-    case MimeUtil::VORBIS:
-      return true;
-
-    case MimeUtil::MPEG2_AAC_LC:
-    case MimeUtil::MPEG2_AAC_MAIN:
-    case MimeUtil::MPEG2_AAC_SSR:
-      // MPEG-2 variants of AAC are not supported on Android.
-      return false;
-
-    case MimeUtil::VP9:
-      // VP9 is supported only in KitKat+ (API Level 19).
-      return base::android::BuildInfo::GetInstance()->sdk_int() >= 19;
-
-    case MimeUtil::OPUS:
-      // Opus is supported only in Lollipop+ (API Level 21).
-      return base::android::BuildInfo::GetInstance()->sdk_int() >= 21;
-
-    case MimeUtil::THEORA:
-      return false;
-  }
-
-  return false;
-}
-#endif
-
-struct MediaFormatStrict {
-  const char* const mime_type;
-  const char* const codecs_list;
-};
-
-// Following is the list of RFC 6381 compliant codecs:
-//   mp4a.66     - MPEG-2 AAC MAIN
-//   mp4a.67     - MPEG-2 AAC LC
-//   mp4a.68     - MPEG-2 AAC SSR
-//   mp4a.69     - MPEG-2 extension to MPEG-1
-//   mp4a.6B     - MPEG-1 audio
-//   mp4a.40.2   - MPEG-4 AAC LC
-//   mp4a.40.02  - MPEG-4 AAC LC (leading 0 in aud-oti for compatibility)
-//   mp4a.40.5   - MPEG-4 HE-AAC v1 (AAC LC + SBR)
-//   mp4a.40.05  - MPEG-4 HE-AAC v1 (AAC LC + SBR) (leading 0 in aud-oti for
-//                 compatibility)
-//   mp4a.40.29  - MPEG-4 HE-AAC v2 (AAC LC + SBR + PS)
-//
-//   avc1.42E0xx - H.264 Baseline
-//   avc1.4D40xx - H.264 Main
-//   avc1.6400xx - H.264 High
-static const char kMP4AudioCodecsExpression[] =
-    "mp4a.66,mp4a.67,mp4a.68,mp4a.69,mp4a.6B,mp4a.40.2,mp4a.40.02,mp4a.40.5,"
-    "mp4a.40.05,mp4a.40.29";
-static const char kMP4VideoCodecsExpression[] =
-    // This is not a complete list of supported avc1 codecs. It is simply used
-    // to register support for the corresponding Codec enum. Instead of using
-    // strings in these three arrays, we should use the Codec enum values.
-    // This will avoid confusion and unnecessary parsing at runtime.
-    // kUnambiguousCodecStringMap/kAmbiguousCodecStringMap should be the only
-    // mapping from strings to codecs. See crbug.com/461009.
-    "avc1.42E00A,avc1.4D400A,avc1.64000A,"
-    "mp4a.66,mp4a.67,mp4a.68,mp4a.69,mp4a.6B,mp4a.40.2,mp4a.40.02,mp4a.40.5,"
-    "mp4a.40.05,mp4a.40.29";
-
-// These containers are also included in
-// common_media_types/proprietary_media_types. See crbug.com/461012.
-static const MediaFormatStrict format_codec_mappings[] = {
-    {"video/webm", "opus,vorbis,vp8,vp8.0,vp9,vp9.0"},
-    {"audio/webm", "opus,vorbis"},
-    {"audio/wav", "1"},
-    {"audio/x-wav", "1"},
-// Android does not support Opus in Ogg container.
-#if defined(OS_ANDROID)
-    {"video/ogg", "theora,vorbis"},
-    {"audio/ogg", "vorbis"},
-    {"application/ogg", "theora,vorbis"},
-#else
-    {"video/ogg", "opus,theora,vorbis"},
-    {"audio/ogg", "opus,vorbis"},
-    {"application/ogg", "opus,theora,vorbis"},
-#endif
-    {"audio/mpeg", "mp3"},
-    {"audio/mp3", ""},
-    {"audio/x-mp3", ""},
-    {"audio/mp4", kMP4AudioCodecsExpression},
-    {"audio/x-m4a", kMP4AudioCodecsExpression},
-    {"video/mp4", kMP4VideoCodecsExpression},
-    {"video/x-m4v", kMP4VideoCodecsExpression},
-    {"application/x-mpegurl", kMP4VideoCodecsExpression},
-    {"application/vnd.apple.mpegurl", kMP4VideoCodecsExpression}};
-
-struct CodecIDMappings {
-  const char* const codec_id;
-  MimeUtil::Codec codec;
-};
-
-// List of codec IDs that provide enough information to determine the
-// codec and profile being requested.
-//
-// The "mp4a" strings come from RFC 6381.
-static const CodecIDMappings kUnambiguousCodecStringMap[] = {
-    {"1", MimeUtil::PCM},  // We only allow this for WAV so it isn't ambiguous.
-    // avc1/avc3.XXXXXX may be unambiguous; handled by ParseH264CodecID().
-    {"mp3", MimeUtil::MP3},
-    {"mp4a.66", MimeUtil::MPEG2_AAC_MAIN},
-    {"mp4a.67", MimeUtil::MPEG2_AAC_LC},
-    {"mp4a.68", MimeUtil::MPEG2_AAC_SSR},
-    {"mp4a.69", MimeUtil::MP3},
-    {"mp4a.6B", MimeUtil::MP3},
-    {"mp4a.40.2", MimeUtil::MPEG4_AAC_LC},
-    {"mp4a.40.02", MimeUtil::MPEG4_AAC_LC},
-    {"mp4a.40.5", MimeUtil::MPEG4_AAC_SBR_v1},
-    {"mp4a.40.05", MimeUtil::MPEG4_AAC_SBR_v1},
-    {"mp4a.40.29", MimeUtil::MPEG4_AAC_SBR_PS_v2},
-    {"vorbis", MimeUtil::VORBIS},
-    {"opus", MimeUtil::OPUS},
-    {"vp8", MimeUtil::VP8},
-    {"vp8.0", MimeUtil::VP8},
-    {"vp9", MimeUtil::VP9},
-    {"vp9.0", MimeUtil::VP9},
-    {"theora", MimeUtil::THEORA}};
-
-// List of codec IDs that are ambiguous and don't provide
-// enough information to determine the codec and profile.
-// The codec in these entries indicate the codec and profile
-// we assume the user is trying to indicate.
-static const CodecIDMappings kAmbiguousCodecStringMap[] = {
-    {"mp4a.40", MimeUtil::MPEG4_AAC_LC},
-    {"avc1", MimeUtil::H264_BASELINE},
-    {"avc3", MimeUtil::H264_BASELINE},
-    // avc1/avc3.XXXXXX may be ambiguous; handled by ParseH264CodecID().
-};
-
-MimeUtil::MimeUtil() : allow_proprietary_codecs_(false) {
-  InitializeMimeTypeMaps();
-}
-
-SupportsType MimeUtil::AreSupportedCodecs(
-    const CodecSet& supported_codecs,
-    const std::vector<std::string>& codecs) const {
-  DCHECK(!supported_codecs.empty());
-  DCHECK(!codecs.empty());
-
-  SupportsType result = IsSupported;
-  for (size_t i = 0; i < codecs.size(); ++i) {
-    bool is_ambiguous = true;
-    Codec codec = INVALID_CODEC;
-    if (!StringToCodec(codecs[i], &codec, &is_ambiguous))
-      return IsNotSupported;
-
-    if (!IsCodecSupported(codec) ||
-        supported_codecs.find(codec) == supported_codecs.end()) {
-      return IsNotSupported;
-    }
-
-    if (is_ambiguous)
-      result = MayBeSupported;
-  }
-
-  return result;
-}
-
-void MimeUtil::InitializeMimeTypeMaps() {
-  // Initialize the supported media types.
-  for (size_t i = 0; i < arraysize(common_media_types); ++i)
-    media_map_.insert(common_media_types[i]);
-#if defined(USE_PROPRIETARY_CODECS)
-  allow_proprietary_codecs_ = true;
-
-  for (size_t i = 0; i < arraysize(proprietary_media_types); ++i)
-    media_map_.insert(proprietary_media_types[i]);
-#endif
-
-  for (size_t i = 0; i < arraysize(kUnambiguousCodecStringMap); ++i) {
-    string_to_codec_map_[kUnambiguousCodecStringMap[i].codec_id] =
-        CodecEntry(kUnambiguousCodecStringMap[i].codec, false);
-  }
-
-  for (size_t i = 0; i < arraysize(kAmbiguousCodecStringMap); ++i) {
-    string_to_codec_map_[kAmbiguousCodecStringMap[i].codec_id] =
-        CodecEntry(kAmbiguousCodecStringMap[i].codec, true);
-  }
-
-  // Initialize the strict supported media types.
-  for (size_t i = 0; i < arraysize(format_codec_mappings); ++i) {
-    std::vector<std::string> mime_type_codecs;
-    ParseCodecString(format_codec_mappings[i].codecs_list,
-                     &mime_type_codecs,
-                     false);
-
-    CodecSet codecs;
-    for (size_t j = 0; j < mime_type_codecs.size(); ++j) {
-      Codec codec = INVALID_CODEC;
-      bool is_ambiguous = true;
-      CHECK(StringToCodec(mime_type_codecs[j], &codec, &is_ambiguous));
-      DCHECK(!is_ambiguous);
-      codecs.insert(codec);
-    }
-
-    strict_format_map_[format_codec_mappings[i].mime_type] = codecs;
-  }
-}
-
-bool MimeUtil::IsSupportedMediaMimeType(const std::string& mime_type) const {
-  return media_map_.find(base::StringToLowerASCII(mime_type)) !=
-         media_map_.end();
+MimeUtil::MimeUtil() {
 }
 
 // Tests for MIME parameter equality. Each parameter in the |mime_type_pattern|
 // must be matched by a parameter in the |mime_type|. If there are no
 // parameters in the pattern, the match is a success.
 //
 // According rfc2045 keys of parameters are case-insensitive, while values may
 // or may not be case-sensitive, but they are usually case-sensitive. So, this
 // function matches values in *case-sensitive* manner, however note that this
 // may produce some false negatives.
@@ skipping 123 matching lines @@
 bool MimeUtil::IsValidTopLevelMimeType(const std::string& type_string) const {
   std::string lower_type = base::StringToLowerASCII(type_string);
   for (size_t i = 0; i < arraysize(legal_top_level_types); ++i) {
     if (lower_type.compare(legal_top_level_types[i]) == 0)
       return true;
   }
 
   return type_string.size() > 2 && StartsWithASCII(type_string, "x-", false);
 }
 
-bool MimeUtil::AreSupportedMediaCodecs(
-    const std::vector<std::string>& codecs) const {
-  for (size_t i = 0; i < codecs.size(); ++i) {
-    Codec codec = INVALID_CODEC;
-    bool is_ambiguous = true;
-    if (!StringToCodec(codecs[i], &codec, &is_ambiguous) ||
-        !IsCodecSupported(codec)) {
-      return false;
-    }
-  }
-  return true;
-}
-
-void MimeUtil::ParseCodecString(const std::string& codecs,
-                                std::vector<std::string>* codecs_out,
-                                bool strip) {
-  std::string no_quote_codecs;
-  base::TrimString(codecs, "\"", &no_quote_codecs);
-  base::SplitString(no_quote_codecs, ',', codecs_out);
-
-  if (!strip)
-    return;
-
-  // Strip everything past the first '.'
-  for (std::vector<std::string>::iterator it = codecs_out->begin();
-       it != codecs_out->end();
-       ++it) {
-    size_t found = it->find_first_of('.');
-    if (found != std::string::npos)
-      it->resize(found);
-  }
-}
-
-bool MimeUtil::IsStrictMediaMimeType(const std::string& mime_type) const {
-  return strict_format_map_.find(base::StringToLowerASCII(mime_type)) !=
-         strict_format_map_.end();
-}
-
-SupportsType MimeUtil::IsSupportedStrictMediaMimeType(
-    const std::string& mime_type,
-    const std::vector<std::string>& codecs) const {
-  const std::string mime_type_lower_case = base::StringToLowerASCII(mime_type);
-  StrictMappings::const_iterator it_strict_map =
-      strict_format_map_.find(mime_type_lower_case);
-  if (it_strict_map == strict_format_map_.end())
-    return codecs.empty() ? MayBeSupported : IsNotSupported;
-
-  if (it_strict_map->second.empty()) {
-    // We get here if the mimetype does not expect a codecs parameter.
-    return (codecs.empty() &&
-            IsDefaultCodecSupportedLowerCase(mime_type_lower_case))
-               ? IsSupported
-               : IsNotSupported;
-  }
-
-  if (codecs.empty()) {
-    // We get here if the mimetype expects to get a codecs parameter,
-    // but didn't get one. If |mime_type_lower_case| does not have a default
-    // codec the best we can do is say "maybe" because we don't have enough
-    // information.
-    Codec default_codec = INVALID_CODEC;
-    if (!GetDefaultCodecLowerCase(mime_type_lower_case, &default_codec))
-      return MayBeSupported;
-
-    return IsCodecSupported(default_codec) ? IsSupported : IsNotSupported;
-  }
-
-  return AreSupportedCodecs(it_strict_map->second, codecs);
-}
-
-void MimeUtil::RemoveProprietaryMediaTypesAndCodecsForTests() {
-  for (size_t i = 0; i < arraysize(proprietary_media_types); ++i)
-    media_map_.erase(proprietary_media_types[i]);
-  allow_proprietary_codecs_ = false;
-}
-
-// Returns true iff |profile_str| conforms to hex string "42y0", where y is one
-// of [8..F]. Requiring constraint_set0_flag be set and profile_idc be 0x42 is
-// taken from ISO-14496-10 7.3.2.1, 7.4.2.1, and Annex A.2.1.
-//
-// |profile_str| is the first four characters of the H.264 suffix string
-// (ignoring the last 2 characters of the full 6 character suffix that are
-// level_idc). From ISO-14496-10 7.3.2.1, it consists of:
-// 8 bits: profile_idc: required to be 0x42 here.
-// 1 bit: constraint_set0_flag : required to be true here.
-// 1 bit: constraint_set1_flag : ignored here.
-// 1 bit: constraint_set2_flag : ignored here.
-// 1 bit: constraint_set3_flag : ignored here.
-// 4 bits: reserved : required to be 0 here.
-//
-// The spec indicates other ways, not implemented here, that a |profile_str|
-// can indicate a baseline conforming decoder is sufficient for decode in Annex
-// A.2.1: "[profile_idc not necessarily 0x42] with constraint_set0_flag set and
-// in which level_idc and constraint_set3_flag represent a level less than or
-// equal to the specified level."
-static bool IsValidH264BaselineProfile(const std::string& profile_str) {
-  uint32 constraint_set_bits;
-  if (profile_str.size() != 4 ||
-      profile_str[0] != '4' ||
-      profile_str[1] != '2' ||
-      profile_str[3] != '0' ||
-      !base::HexStringToUInt(base::StringPiece(profile_str.c_str() + 2, 1),
-                             &constraint_set_bits)) {
-    return false;
-  }
-
-  return constraint_set_bits >= 8;
-}
-
-static bool IsValidH264Level(const std::string& level_str) {
-  uint32 level;
-  if (level_str.size() != 2 || !base::HexStringToUInt(level_str, &level))
-    return false;
-
-  // Valid levels taken from Table A-1 in ISO-14496-10.
-  // Essentially |level_str| is toHex(10 * level).
-  return ((level >= 10 && level <= 13) ||
-          (level >= 20 && level <= 22) ||
-          (level >= 30 && level <= 32) ||
-          (level >= 40 && level <= 42) ||
-          (level >= 50 && level <= 51));
-}
-
-// Handle parsing H.264 codec IDs as outlined in RFC 6381 and ISO-14496-10.
-//   avc1.42y0xx, y >= 8 - H.264 Baseline
-//   avc1.4D40xx         - H.264 Main
-//   avc1.6400xx         - H.264 High
-//
-//   avc1.xxxxxx & avc3.xxxxxx are considered ambiguous forms that are trying to
-//   signal H.264 Baseline. For example, the idc_level, profile_idc and
-//   constraint_set3_flag pieces may explicitly require decoder to conform to
-//   baseline profile at the specified level (see Annex A and constraint_set0 in
-//   ISO-14496-10).
-static bool ParseH264CodecID(const std::string& codec_id,
-                             MimeUtil::Codec* codec,
-                             bool* is_ambiguous) {
-  // Make sure we have avc1.xxxxxx or avc3.xxxxxx
-  if (codec_id.size() != 11 ||
-      (!StartsWithASCII(codec_id, "avc1.", true) &&
-       !StartsWithASCII(codec_id, "avc3.", true))) {
-    return false;
-  }
-
-  std::string profile = StringToUpperASCII(codec_id.substr(5, 4));
-  if (IsValidH264BaselineProfile(profile)) {
-    *codec = MimeUtil::H264_BASELINE;
-  } else if (profile == "4D40") {
-    *codec = MimeUtil::H264_MAIN;
-  } else if (profile == "6400") {
-    *codec = MimeUtil::H264_HIGH;
-  } else {
-    *codec = MimeUtil::H264_BASELINE;
-    *is_ambiguous = true;
-    return true;
-  }
-
-  *is_ambiguous = !IsValidH264Level(StringToUpperASCII(codec_id.substr(9)));
-  return true;
-}
-
-bool MimeUtil::StringToCodec(const std::string& codec_id,
-                             Codec* codec,
-                             bool* is_ambiguous) const {
-  StringToCodecMappings::const_iterator itr =
-      string_to_codec_map_.find(codec_id);
-  if (itr != string_to_codec_map_.end()) {
-    *codec = itr->second.codec;
-    *is_ambiguous = itr->second.is_ambiguous;
-    return true;
-  }
-
-  // If |codec_id| is not in |string_to_codec_map_|, then we assume that it is
-  // an H.264 codec ID because currently those are the only ones that can't be
-  // stored in the |string_to_codec_map_| and require parsing.
-  return ParseH264CodecID(codec_id, codec, is_ambiguous);
-}
-
-bool MimeUtil::IsCodecSupported(Codec codec) const {
-  DCHECK_NE(codec, INVALID_CODEC);
-
-#if defined(OS_ANDROID)
-  if (!IsCodecSupportedOnAndroid(codec))
-    return false;
-#endif
-
-  return allow_proprietary_codecs_ || !IsCodecProprietary(codec);
-}
-
-bool MimeUtil::IsCodecProprietary(Codec codec) const {
-  switch (codec) {
-    case INVALID_CODEC:
-    case MP3:
-    case MPEG2_AAC_LC:
-    case MPEG2_AAC_MAIN:
-    case MPEG2_AAC_SSR:
-    case MPEG4_AAC_LC:
-    case MPEG4_AAC_SBR_v1:
-    case MPEG4_AAC_SBR_PS_v2:
-    case H264_BASELINE:
-    case H264_MAIN:
-    case H264_HIGH:
-      return true;
-
-    case PCM:
-    case VORBIS:
-    case OPUS:
-    case VP8:
-    case VP9:
-    case THEORA:
-      return false;
-  }
-
-  return true;
-}
-
-bool MimeUtil::GetDefaultCodecLowerCase(const std::string& mime_type_lower_case,
-                                        Codec* default_codec) const {
-  if (mime_type_lower_case == "audio/mpeg" ||
-      mime_type_lower_case == "audio/mp3" ||
-      mime_type_lower_case == "audio/x-mp3") {
-    *default_codec = MimeUtil::MP3;
-    return true;
-  }
-
-  return false;
-}
-
-bool MimeUtil::IsDefaultCodecSupportedLowerCase(
-    const std::string& mime_type_lower_case) const {
-  Codec default_codec = Codec::INVALID_CODEC;
-  if (!GetDefaultCodecLowerCase(mime_type_lower_case, &default_codec))
-    return false;
-  return IsCodecSupported(default_codec);
-}
-
 //----------------------------------------------------------------------------
 // Wrappers for the singleton
 //----------------------------------------------------------------------------
 
 bool GetMimeTypeFromExtension(const base::FilePath::StringType& ext,
                               std::string* mime_type) {
   return g_mime_util.Get().GetMimeTypeFromExtension(ext, mime_type);
 }
 
 bool GetMimeTypeFromFile(const base::FilePath& file_path,
                          std::string* mime_type) {
   return g_mime_util.Get().GetMimeTypeFromFile(file_path, mime_type);
 }
 
 bool GetWellKnownMimeTypeFromExtension(const base::FilePath::StringType& ext,
                                        std::string* mime_type) {
   return g_mime_util.Get().GetWellKnownMimeTypeFromExtension(ext, mime_type);
 }
 
 bool GetPreferredExtensionForMimeType(const std::string& mime_type,
                                       base::FilePath::StringType* extension) {
   return g_mime_util.Get().GetPreferredExtensionForMimeType(mime_type,
                                                             extension);
 }
 
-bool IsSupportedMediaMimeType(const std::string& mime_type) {
-  return g_mime_util.Get().IsSupportedMediaMimeType(mime_type);
-}
-
 bool MatchesMimeType(const std::string& mime_type_pattern,
                      const std::string& mime_type) {
   return g_mime_util.Get().MatchesMimeType(mime_type_pattern, mime_type);
 }
 
 bool ParseMimeTypeWithoutParameter(const std::string& type_string,
                                    std::string* top_level_type,
                                    std::string* subtype) {
   return g_mime_util.Get().ParseMimeTypeWithoutParameter(
       type_string, top_level_type, subtype);
 }
 
 bool IsValidTopLevelMimeType(const std::string& type_string) {
   return g_mime_util.Get().IsValidTopLevelMimeType(type_string);
 }
 
-bool AreSupportedMediaCodecs(const std::vector<std::string>& codecs) {
-  return g_mime_util.Get().AreSupportedMediaCodecs(codecs);
-}
-
-bool IsStrictMediaMimeType(const std::string& mime_type) {
-  return g_mime_util.Get().IsStrictMediaMimeType(mime_type);
-}
-
-SupportsType IsSupportedStrictMediaMimeType(
-    const std::string& mime_type,
-    const std::vector<std::string>& codecs) {
-  return g_mime_util.Get().IsSupportedStrictMediaMimeType(mime_type, codecs);
-}
-
-void ParseCodecString(const std::string& codecs,
-                      std::vector<std::string>* codecs_out,
-                      const bool strip) {
-  g_mime_util.Get().ParseCodecString(codecs, codecs_out, strip);
-}
-
 namespace {
 
 // From http://www.w3schools.com/media/media_mimeref.asp and
 // http://plugindoc.mozdev.org/winmime.php
 static const char* const kStandardImageTypes[] = {
   "image/bmp",
   "image/cis-cod",
   "image/gif",
   "image/ief",
   "image/jpeg",
@@ skipping 67 matching lines @@
 void GetExtensionsFromHardCodedMappings(
     const MimeInfo* mappings,
     size_t mappings_len,
     const std::string& leading_mime_type,
     base::hash_set<base::FilePath::StringType>* extensions) {
   for (size_t i = 0; i < mappings_len; ++i) {
     if (StartsWithASCII(mappings[i].mime_type, leading_mime_type, false)) {
       std::vector<string> this_extensions;
       base::SplitString(mappings[i].extensions, ',', &this_extensions);
       for (size_t j = 0; j < this_extensions.size(); ++j) {
 #if defined(OS_WIN)

[ddorwin, 2015/05/08 16:29:19]

#include "build/build_config.h"

         base::FilePath::StringType extension(
             base::UTF8ToWide(this_extensions[j]));
 #else
         base::FilePath::StringType extension(this_extensions[j]);
 #endif
         extensions->insert(extension);
       }
     }
   }
 }
@@ skipping 74 matching lines @@
 
     GetExtensionsFromHardCodedMappings(secondary_mappings,
                                        arraysize(secondary_mappings),
                                        mime_type,
                                        &unique_extensions);
   }
 
   HashSetToVector(&unique_extensions, extensions);
 }
 
-void RemoveProprietaryMediaTypesAndCodecsForTests() {
-  g_mime_util.Get().RemoveProprietaryMediaTypesAndCodecsForTests();
-}
-
 void AddMultipartValueForUpload(const std::string& value_name,
                                 const std::string& value,
                                 const std::string& mime_boundary,
                                 const std::string& content_type,
                                 std::string* post_data) {
   DCHECK(post_data);
   // First line is the boundary.
   post_data->append("--" + mime_boundary + "\r\n");
   // Next line is the Content-disposition.
   post_data->append("Content-Disposition: form-data; name=\"" +
                     value_name + "\"\r\n");
   if (!content_type.empty()) {
     // If Content-type is specified, the next line is that.
     post_data->append("Content-Type: " + content_type + "\r\n");
   }
   // Leave an empty line and append the value.
   post_data->append("\r\n" + value + "\r\n");
 }
 
 void AddMultipartFinalDelimiterForUpload(const std::string& mime_boundary,
                                          std::string* post_data) {
   DCHECK(post_data);
   post_data->append("--" + mime_boundary + "--\r\n");
 }
 
 }  // namespace net