Squashed commit of the following CDM changes:

* Add additional parameters to CDM decryption API
  https://widevine-internal-review.googlesource.com/#/c/6500/

* Pass Length and Flags Parameters to Decrypt()
  https://widevine-internal-review.googlesource.com/#/c/6740/

* Remove core files from oemcrypto/mock
  https://widevine-internal-review.googlesource.com/#/c/6853/

Change-Id: I1c73f5454da20da99130b161543fb990e16e7130

libwvdrmengine/cdm/include/wv_content_decryption_module.h

@@ -56,8 +56,7 @@ class WvContentDecryptionModule {
 
   // Provisioning related methods
   virtual CdmResponseType GetProvisioningRequest(
-      CdmProvisioningRequest* request,
-      std::string* default_url);
+      CdmProvisioningRequest* request, std::string* default_url);
 
   virtual CdmResponseType HandleProvisioningResponse(
       CdmProvisioningResponse& response);
@@ -67,23 +66,20 @@ class WvContentDecryptionModule {
   virtual CdmResponseType ReleaseSecureStops(
       const CdmSecureStopReleaseMessage& message);
 
-  // Accept encrypted buffer and return decrypted data.
+  // Accept encrypted buffer and decrypt data.
+  // Decryption parameters that need to be specified are
+  // is_encrypted, is_secure, key_id, encrypt_buffer, encrypt_length,
+  // iv, block_offset, decrypt_buffer, decrypt_buffer_length,
+  // decrypt_buffer_offset and subsample_flags
   virtual CdmResponseType Decrypt(const CdmSessionId& session_id,
-                                  bool is_encrypted,
-                                  bool is_secure,
-                                  const KeyId& key_id,
-                                  const uint8_t* encrypt_buffer,
-                                  size_t encrypt_length,
-                                  const std::vector<uint8_t>& iv,
-                                  size_t block_offset,
-                                  void* decrypt_buffer,
-                                  size_t decrypt_buffer_offset);
+                                  const CdmDecryptionParameters& parameters);
 
   // Event listener related methods
   virtual bool AttachEventListener(const CdmSessionId& session_id,
                                    WvCdmEventListener* listener);
   virtual bool DetachEventListener(const CdmSessionId& session_id,
                                    WvCdmEventListener* listener);
+
  private:
 
   // instance variables