Fix in process PPAPI decryption.

ppapi/c/private/ppb_content_decryptor_private.h

Index: ppapi/c/private/ppb_content_decryptor_private.h
diff --git a/ppapi/c/private/ppb_content_decryptor_private.h b/ppapi/c/private/ppb_content_decryptor_private.h
index 486d9d759697516b54cdb11413f5437edfb1fc16..91209849ad1e35c6b074c255b005995c43c268b1 100644
--- a/ppapi/c/private/ppb_content_decryptor_private.h
+++ b/ppapi/c/private/ppb_content_decryptor_private.h
@@ -4,7 +4,7 @@
  */
 
 /* From private/ppb_content_decryptor_private.idl,
- *   modified Tue Dec  4 10:30:29 2012.
+ *   modified Mon Dec 10 13:46:33 2012.
  */
 
 #ifndef PPAPI_C_PRIVATE_PPB_CONTENT_DECRYPTOR_PRIVATE_H_
@@ -148,6 +148,10 @@ struct PPB_ContentDecryptor_Private_0_6 {
    * <code>PPP_ContentDecryptor_Private</code> interface completes to
    * deliver decrypted_block to the browser for decoding and rendering.
    *
+   * The plugin must not hold a reference to the encrypted buffer resource
+   * provided to <code>Decrypt()</code> when it calls this method. The browser
+   * will reuse the buffer in a subsequent <code>Decrypt()</code> call.
+   *
    * @param[in] decrypted_block A <code>PP_Resource</code> corresponding to a
    * <code>PPB_Buffer_Dev</code> resource that contains a decrypted data
    * block.
@@ -215,6 +219,11 @@ struct PPB_ContentDecryptor_Private_0_6 {
    * <code>PPP_ContentDecryptor_Private</code> interface completes to deliver
    * a decrypted and decoded video frame to the browser for rendering.
    *
+   * The plugin must not hold a reference to the encrypted buffer resource
+   * provided to <code>DecryptAndDecode()</code> when it calls this method. The
+   * browser will reuse the buffer in a subsequent
+   * <code>DecryptAndDecode()</code> call.
+   *
    * @param[in] decrypted_frame A <code>PP_Resource</code> corresponding to a
    * <code>PPB_Buffer_Dev</code> resource that contains a video frame.
    *
@@ -228,10 +237,15 @@ struct PPB_ContentDecryptor_Private_0_6 {
       const struct PP_DecryptedFrameInfo* decrypted_frame_info);
   /**
    * Called after the <code>DecryptAndDecode()</code> method on the
-   * <code>PPP_ContentDecryptor_Private</code> interface completes to
-   * deliver a buffer of decrypted and decoded audio samples to the browser for
+   * <code>PPP_ContentDecryptor_Private</code> interface completes to deliver
+   * a buffer of decrypted and decoded audio samples to the browser for
    * rendering.
    *
+   * The plugin must not hold a reference to the encrypted buffer resource
+   * provided to <code>DecryptAndDecode()</code> when it calls this method. The
+   * browser will reuse the buffer in a subsequent
+   * <code>DecryptAndDecode()</code> call.
+   *
    * <code>audio_frames</code> can contain multiple audio output buffers. Each
    * buffer is serialized in this format:
    *