Update PPP side of Pepper CDM API to support video decoding.

ppapi/api/private/pp_content_decryptor.idl

Index: ppapi/api/private/pp_content_decryptor.idl
diff --git a/ppapi/api/private/pp_content_decryptor.idl b/ppapi/api/private/pp_content_decryptor.idl
index 14d9c1c596ff3fb793fef88a6563ae8671ad7730..04023143afd0b30a2586a1242a68668f1ebb14ce 100644
--- a/ppapi/api/private/pp_content_decryptor.idl
+++ b/ppapi/api/private/pp_content_decryptor.idl
@@ -114,6 +114,58 @@ struct PP_EncryptedBlockInfo {
 };
 
 /**
+ * <code>PP_DecryptedFrameFormat</code> contains video frame formats.
+ */
+[assert_size(4)]
+enum PP_DecryptedFrameFormat {
+  PP_DECRYPTEDFRAMEFORMAT_UNKNOWN = 0,
+  PP_DECRYPTEDFRAMEFORMAT_EMPTY = 1,
+  PP_DECRYPTEDFRAMEFORMAT_YV12 = 2,
+  PP_DECRYPTEDFRAMEFORMAT_I420 = 3
+};
+
+/**
+ * <code>PP_VideoCodec</code> contains video codec type constants.
+ */
+[assert_size(4)]
+enum PP_VideoCodec {
+  PP_VIDEOCODEC_UNKNOWN = 0,
+  PP_VIDEOCODEC_VP8 = 1
+};
+
+/**
+ * <code>PP_EncryptedVideoFrameInfo</code> contains the information required
+ * to decrypt and decode a video frame.
+ */
+[assert_size(256)]
+struct PP_EncryptedVideoFrameInfo {
+  /**
+   * The decoded video frame format.
+   */
+  PP_DecryptedFrameFormat format;
+
+  /**
+   * The video frame codec type.
+   */
+  PP_VideoCodec codec;
+
+  /**
+   * Video frame width in pixels.
+   */
+  int32_t width;
+
+  /**
+   * Video frame height in pixels.
+   */
+  int32_t height;
+
+  /** 
+   * Information required to decrypt the frame.
+   */
+  PP_EncryptedBlockInfo encryption_info;
+};
+
+/**
  * The <code>PP_DecryptResult</code> enum contains decryption and decoding
  * result constants.
  */