Hook up CDM calls in CdmWrapper.

ppapi/api/private/ppp_content_decryptor_private.idl

Index: ppapi/api/private/ppp_content_decryptor_private.idl
diff --git a/ppapi/api/private/ppp_content_decryptor_private.idl b/ppapi/api/private/ppp_content_decryptor_private.idl
index 81d353fde6d15994e0833f871f412618e87db62e..7207b8397e967a15263b9a0e9d4bb840e29edc21 100644
--- a/ppapi/api/private/ppp_content_decryptor_private.idl
+++ b/ppapi/api/private/ppp_content_decryptor_private.idl
@@ -36,6 +36,11 @@ interface PPP_ContentDecryptor_Private {
    * @param[in] init_data A <code>PP_Var</code> of type
    * <code>PP_VARTYPE_ARRAYBUFFER</code> containing container specific
    * initialization data.
+   *
+   * @return <code>PP_TRUE</code> if this call was forwarded to the CDM
+   * successfully, <code>PP_FALSE</code> otherwise. Once the call reaches the
+   * CDM, the call result/status should be reported through the
+   * <code>PPB_ContentDecryptor_Private</code> interface.
    */
   PP_Bool GenerateKeyRequest(
       [in] PP_Instance instance,
@@ -63,6 +68,11 @@ interface PPP_ContentDecryptor_Private {
    * @param[in] init_data A <code>PP_Var</code> of type
    * <code>PP_VARTYPE_ARRAYBUFFER</code> containing container specific
    * initialization data.
+   *
+   * @return <code>PP_TRUE</code> if this call was forwarded to the CDM
+   * successfully, <code>PP_FALSE</code> otherwise. Once the call reaches the
+   * CDM, the call result/status should be reported through the
+   * <code>PPB_ContentDecryptor_Private</code> interface.
    */
   PP_Bool AddKey(
       [in] PP_Instance instance,
@@ -75,6 +85,11 @@ interface PPP_ContentDecryptor_Private {
    *
    * @param[in] session_id A <code>PP_Var</code> of type
    * <code>PP_VARTYPE_STRING</code> containing the session ID.
+   *
+   * @return <code>PP_TRUE</code> if this call was forwarded to the CDM
+   * successfully, <code>PP_FALSE</code> otherwise. Once the call reaches the
+   * CDM, the call result/status should be reported through the
+   * <code>PPB_ContentDecryptor_Private</code> interface.
    */
   PP_Bool CancelKeyRequest(
       [in] PP_Instance instance,
@@ -93,6 +108,11 @@ interface PPP_ContentDecryptor_Private {
    * @param[in] encrypted_block_info A <code>PP_EncryptedBlockInfo</code> that
    * contains all auxiliary information needed for decryption of the
    * <code>encrypted_block</code>.
+   *
+   * @return <code>PP_TRUE</code> if this call was forwarded to the CDM
+   * successfully, <code>PP_FALSE</code> otherwise. Once the call reaches the
+   * CDM, the call result/status should be reported through the
+   * <code>PPB_ContentDecryptor_Private</code> interface.
    */
   PP_Bool Decrypt(
       [in] PP_Instance instance,
@@ -115,6 +135,11 @@ interface PPP_ContentDecryptor_Private {
    * @param[in] encrypted_block_info A <code>PP_EncryptedBlockInfo</code> that
    * contains all auxiliary information needed for decryption of the
    * <code>encrypted_block</code>.
+   *
+   * @return <code>PP_TRUE</code> if this call was forwarded to the CDM
+   * successfully, <code>PP_FALSE</code> otherwise. Once the call reaches the
+   * CDM, the call result/status should be reported through the
+   * <code>PPB_ContentDecryptor_Private</code> interface.
    */
   PP_Bool DecryptAndDecode(
       [in] PP_Instance instance,