Revert of Combine 'pssh' parsing routines.

media/cdm/cenc_utils.h

Index: media/cdm/cenc_utils.h
diff --git a/media/cdm/cenc_utils.h b/media/cdm/cenc_utils.h
index 7dd82a1537ff7edf656fc6a4c9b23c785c685c52..ec85fb34e8b2f36728ada7438708c2eaf741d8be 100644
--- a/media/cdm/cenc_utils.h
+++ b/media/cdm/cenc_utils.h
@@ -28,17 +28,6 @@
 MEDIA_EXPORT bool GetKeyIdsForCommonSystemId(const std::vector<uint8_t>& input,
                                              KeyIdList* key_ids);
 
-// Gets the data field from the first 'pssh' box containing |system_id| UUID.
-// Returns true if such a box is found and successfully parsed. Returns false
-// otherwise.
-// Notes:
-// 1. If multiple PSSH boxes are found, the "Data" of the first matching 'pssh'
-//    box will be set in |pssh_data|.
-// 2. Only PSSH boxes are allowed in |input|.
-MEDIA_EXPORT bool GetPsshData(const std::vector<uint8_t>& input,
-                              const std::vector<uint8_t>& system_id,
-                              std::vector<uint8_t>* pssh_data);
-
 }  // namespace media
 
 #endif  // MEDIA_CDM_CENC_UTILS_H_