diff -up chromium-62.0.3192.0/media/base/mime_util_internal.cc.wmvflvmpg chromium-62.0.3192.0/media/base/mime_util_internal.cc
--- chromium-62.0.3192.0/media/base/mime_util_internal.cc.wmvflvmpg	2017-08-30 15:52:00.602204610 +0200
+++ chromium-62.0.3192.0/media/base/mime_util_internal.cc	2017-08-30 16:08:19.855437935 +0200
@@ -78,6 +78,16 @@
         {"mp2", MimeUtil::MP2},
         {"mp4v.20.8", MimeUtil::MPEG4_SP},
         {"mp4v.20.240", MimeUtil::MPEG4_ASP},
+        {"msmpeg4v1", MimeUtil::MSMPEG4v1},
+        {"msmpeg4v2", MimeUtil::MSMPEG4v2},
+        {"msmpeg4v3", MimeUtil::MSMPEG4v3},
+        {"wmv7", MimeUtil::WMV7},
+        {"wmv8", MimeUtil::WMV8},
+        {"wmv9", MimeUtil::WMV9},
+        {"vc-1", MimeUtil::VC1},
+        {"wma", MimeUtil::WMA},
+        {"vp6", MimeUtil::VP6},
+        {"mpeg1", MimeUtil::MPEG1},
 // TODO(dalecurtis): This is not the correct final string. Fix before enabling
 // by default. http://crbug.com/784607
 #if BUILDFLAG(ENABLE_AV1_DECODER)
@@ -311,7 +321,8 @@
 
   CodecSet webm_codecs(webm_audio_codecs);
   webm_codecs.insert(webm_video_codecs.begin(), webm_video_codecs.end());
-
+  
+  const CodecSet mp1_codecs{MPEG1};
   const CodecSet mp3_codecs{MP3};
 
   CodecSet mp4_audio_codecs;
@@ -354,6 +365,27 @@
   CodecSet mp4_codecs(mp4_audio_codecs);
   mp4_codecs.insert(mp4_video_codecs.begin(), mp4_video_codecs.end());
 
+  const CodecSet wma_codecs{WMA};
+
+  CodecSet wmv_codecs(wma_codecs);
+  wmv_codecs.emplace(MSMPEG4v1);
+  wmv_codecs.emplace(MSMPEG4v2);
+  wmv_codecs.emplace(MSMPEG4v3);
+  wmv_codecs.emplace(MPEG4_SP);
+  wmv_codecs.emplace(MPEG4_ASP);
+  wmv_codecs.emplace(WMV7);
+  wmv_codecs.emplace(WMV8);
+  wmv_codecs.emplace(WMV9);
+  wmv_codecs.emplace(VC1);
+
+  matroska_codecs.emplace(MSMPEG4v1);
+  matroska_codecs.emplace(MSMPEG4v2);
+  matroska_codecs.emplace(MSMPEG4v3);
+
+  CodecSet flv_codecs(mp4_codecs);
+  flv_codecs.emplace(VP6);
+  flv_codecs.emplace(MP3);
+
   const CodecSet implicit_codec;
   AddContainerWithCodecs("audio/wav", wav_codecs, false);
   AddContainerWithCodecs("audio/x-wav", wav_codecs, false);
@@ -377,6 +409,11 @@
 
   AddContainerWithCodecs("audio/x-matroska", matroska_audio_codecs, false);
   AddContainerWithCodecs("video/x-matroska", matroska_codecs, false);
+  AddContainerWithCodecs("video/x-ms-wmv", wmv_codecs, true);
+  AddContainerWithCodecs("audio/x-ms-wma", wma_codecs, true);
+  AddContainerWithCodecs("video/x-ms-asf", wmv_codecs, true);
+  AddContainerWithCodecs("video/x-flv", flv_codecs, true);
+  AddContainerWithCodecs("video/mpeg", mp1_codecs, true);
 
 #if BUILDFLAG(USE_PROPRIETARY_CODECS)
   AddContainerWithCodecs("audio/aac", implicit_codec, true);  // AAC / ADTS.
@@ -1017,6 +1054,15 @@
     case DTS:
     case MPEG4_SP:
     case MPEG4_ASP:
+    case MSMPEG4v1:
+    case MSMPEG4v2:
+    case MSMPEG4v3:
+    case WMV7:
+    case WMV8:
+    case WMV9:
+    case VC1:
+    case WMA:
+    case VP6:
       return true;
 
     case MP3:
@@ -1029,6 +1075,7 @@
     case VP9:
     case THEORA:
     case AV1:
+    case MPEG1:
       return false;
   }
 
diff -up chromium-62.0.3192.0/media/base/mime_util_internal.h.wmvflvmpg chromium-62.0.3192.0/media/base/mime_util_internal.h
--- chromium-62.0.3192.0/media/base/mime_util_internal.h.wmvflvmpg	2017-08-30 15:52:00.602204610 +0200
+++ chromium-62.0.3192.0/media/base/mime_util_internal.h	2017-08-30 15:52:00.616204356 +0200
@@ -48,7 +48,17 @@ class MEDIA_EXPORT MimeUtil {
     MP2,
     MPEG4_SP,
     MPEG4_ASP,
-    LAST_CODEC = MPEG4_ASP
+    MSMPEG4v1,
+    MSMPEG4v2,
+    MSMPEG4v3,
+    WMV7,
+    WMV8,
+    WMV9,
+    VC1,
+    WMA,
+    VP6,
+    MPEG1,
+    LAST_CODEC = MPEG1
   };
 
   // Platform configuration structure.  Controls which codecs are supported at
diff -up chromium-62.0.3192.0/net/base/mime_util.cc.wmvflvmpg chromium-62.0.3192.0/net/base/mime_util.cc
--- chromium-62.0.3192.0/net/base/mime_util.cc.wmvflvmpg	2017-08-30 15:52:00.604204573 +0200
+++ chromium-62.0.3192.0/net/base/mime_util.cc	2017-08-30 16:08:50.210885222 +0200
@@ -94,6 +94,10 @@ static const MimeInfo kPrimaryMappings[]
     {"video/x-matroska", "mkv"},
     {"audio/x-matroska", "mkv"},
     {"video/x-msvideo", "avi"},
+    {"video/x-ms-wmv", "wmv"},
+    {"audio/x-ms-wma", "wma"},
+    {"video/x-flv", "flv"},
+    {"video/mpeg", "mpg,mpeg"},
     {"multipart/related", "mht,mhtml"},
     {"text/css", "css"},
     {"text/html", "html,htm,shtml,shtm"},
@@ -512,6 +516,7 @@ static const char* const kStandardVideoT
   "video/sd-video",
   "video/webm",
   "video/x-dv",
+  "video/x-flv",
   "video/x-m4v",
   "video/x-matroska",
   "video/x-mpeg",