Revert 147169 - Add support for encrypted WebM files as defined in the RFC.

media/webm/webm_constants.h

Index: media/webm/webm_constants.h
===================================================================
--- media/webm/webm_constants.h	(revision 147171)
+++ media/webm/webm_constants.h	(working copy)
@@ -12,7 +12,6 @@
 // WebM element IDs.
 // This is a subset of the IDs in the Matroska spec.
 // http://www.matroska.org/technical/specs/index.html
-const int kWebMIdAESSettingsCipherMode = 0x47E8;
 const int kWebMIdAspectRatioType = 0x54B3;
 const int kWebMIdAttachedFile = 0x61A7;
 const int kWebMIdAttachmentLink = 0x7446;
@@ -63,7 +62,6 @@
 const int kWebMIdContentCompAlgo = 0x4254;
 const int kWebMIdContentCompression = 0x5034;
 const int kWebMIdContentCompSettings = 0x4255;
-const int kWebMIdContentEncAESSettings = 0x47E7;
 const int kWebMIdContentEncAlgo = 0x47E1;
 const int kWebMIdContentEncKeyID = 0x47E2;
 const int kWebMIdContentEncoding = 0x6240;
@@ -199,11 +197,6 @@
 
 const uint8 kWebMFlagKeyframe = 0x80;
 
-// The size is from the WebM encrypted specification. Current encrypted WebM
-// request for comments specification is here
-// http://wiki.webmproject.org/encryption/webm-encryption-rfc
-const int kWebMHmacSize = 12;
-
 }  // namespace media
 
 #endif  // MEDIA_WEBM_WEBM_CONSTANTS_H_