Remove the checksum/HMAC code from the decryptor.

webkit/media/crypto/proxy_decryptor_unittest.cc

Index: webkit/media/crypto/proxy_decryptor_unittest.cc
diff --git a/webkit/media/crypto/proxy_decryptor_unittest.cc b/webkit/media/crypto/proxy_decryptor_unittest.cc
index 097d48c15ef82fff5c1cb7024bf89cf977b017f1..826d861ffa5544cb6b27b99a86d93bb33f493d91 100644
--- a/webkit/media/crypto/proxy_decryptor_unittest.cc
+++ b/webkit/media/crypto/proxy_decryptor_unittest.cc
@@ -27,7 +27,6 @@ namespace webkit_media {
 
 static const uint8 kFakeKeyId[] = { 0x4b, 0x65, 0x79, 0x20, 0x49, 0x44 };
 static const uint8 kFakeIv[DecryptConfig::kDecryptionKeySize] = { 0 };
-static const uint8 kFakeCheckSum[] = { 0, 0 };
 static const char kFakeKeySystem[] = "system.key.fake";
 static const char kFakeSessionId[] = "FakeSessionId";
 static const uint8 kFakeKey[] = { 0x4b, 0x65, 0x79 };
@@ -45,8 +44,6 @@ static scoped_refptr<DecoderBuffer> CreateFakeEncryptedBuffer() {
                       arraysize(kFakeKeyId)),
           std::string(reinterpret_cast<const char*>(kFakeIv),
                       DecryptConfig::kDecryptionKeySize),
-          std::string(reinterpret_cast<const char*>(kFakeCheckSum),
-                      arraysize(kFakeCheckSum)),
           encrypted_frame_offset,
           std::vector<media::SubsampleEntry>())));
   return encrypted_buffer;