Remove TODO for mime-sniffing of mpeg types.

net/base/mime_sniffer.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.
 
 // Detecting mime types is a tricky business because we need to balance
 // compatibility concerns with security issues.  Here is a survey of how other
 // browsers behave and then a description of how we intend to behave.
 //
 // HTML payload, no Content-Type header:
 // * IE 7: Render as HTML
@@ skipping 144 matching lines @@
   MAGIC_NUMBER("application/x-gzip", "\x1F\x8B\x08")
   MAGIC_NUMBER("audio/x-pn-realaudio", "\x2E\x52\x4D\x46")
   MAGIC_NUMBER("video/x-ms-asf",
       "\x30\x26\xB2\x75\x8E\x66\xCF\x11\xA6\xD9\x00\xAA\x00\x62\xCE\x6C")
   MAGIC_NUMBER("image/tiff", "I I")
   MAGIC_NUMBER("image/tiff", "II*")
   MAGIC_NUMBER("image/tiff", "MM\x00*")
   MAGIC_NUMBER("audio/mpeg", "ID3")
   MAGIC_NUMBER("image/webp", "RIFF....WEBPVP8 ")
   MAGIC_NUMBER("video/webm", "\x1A\x45\xDF\xA3")
-  // TODO(abarth): we don't handle partial byte matches yet
-  // MAGIC_NUMBER("video/mpeg", "\x00\x00\x01\xB")
-  // MAGIC_NUMBER("audio/mpeg", "\xFF\xE")
-  // MAGIC_NUMBER("audio/mpeg", "\xFF\xF")
   MAGIC_NUMBER("application/zip", "PK\x03\x04")
   MAGIC_NUMBER("application/x-rar-compressed", "Rar!\x1A\x07\x00")
   MAGIC_NUMBER("application/x-msmetafile", "\xD7\xCD\xC6\x9A")
   MAGIC_NUMBER("application/octet-stream", "MZ")  // EXE
   // Sniffing for Flash:
   //
   //   MAGIC_NUMBER("application/x-shockwave-flash", "CWS")
   //   MAGIC_NUMBER("application/x-shockwave-flash", "FLV")
   //   MAGIC_NUMBER("application/x-shockwave-flash", "FWS")
   //
@@ skipping 784 matching lines @@
   // First check the extra table.
   if (CheckForMagicNumbers(content, size, kExtraMagicNumbers,
                            arraysize(kExtraMagicNumbers), NULL, result))
     return true;
   // Finally check the original table.
   return CheckForMagicNumbers(content, size, kMagicNumbers,
                               arraysize(kMagicNumbers), NULL, result);
 }
 
 }  // namespace net