Add PPAPI CDM video decoder initialization.

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 248b7356b2d29946e6c7b48f062ae3064d0d44f1..6627dfa97bf1b2e4b762dbe34c4bf5a6e2517edd 100644
--- a/ppapi/api/private/pp_content_decryptor.idl
+++ b/ppapi/api/private/pp_content_decryptor.idl
@@ -260,3 +260,57 @@ struct PP_DecryptedFrameInfo {
    */
   PP_DecryptTrackingInfo tracking_info;
 };
+
+/**
+ * <code>PP_VideoCodecProfile</code> contains video codec profile type
+ * constants required for video decoder configuration.
+ *.
+ */
+[assert_size(4)]
+enum PP_VideoCodecProfile {
+  PP_VIDEOCODECPROFILE_UNKNOWN = 0,
+  PP_VIDEOCODECPROFILE_VP8_MAIN = 1
+};
+
+/**
+ * <code>PP_VideoDecoderConfig</code> contains video decoder configuration
+ * information required to initialize video decoders, and a request ID
+ * that allows clients to associate a decoder initialization request with a
+ * status response. Note: When <code>codec</code> requires extra data for
+ * initialization, the data is sent as a <code>PP_Resource</code> carried
+ * alongside <code>PP_VideoDecoderConfig</code>.
+ */
+[assert_size(24)]
+struct PP_VideoDecoderConfig {
+  /**
+   * The video codec to initialize.
+   */
+  PP_VideoCodec codec;
+
+  /**
+   * Profile to use when initializing the video codec.
+   */
+  PP_VideoCodecProfile profile;
+
+  /**
+   * Output video format.
+   */
+  PP_DecryptedFrameFormat format;
+
+  /**
+   * Width of decoded video frames, in pixels.
+   */
+  int32_t width;
+
+  /**
+   * Height of decoded video frames, in pixels.
+   */
+  int32_t height;
+
+  /**
+   * Client-specified identifier for the associated video decoder initialization
+   * request. By using this value, the client can associate a decoder
+   * initialization status response with an initialization request.
+   */
+  uint32_t request_id;
+};