media config: expand is_encrypted to a struct.

media/formats/webm/webm_video_client.cc

Index: media/formats/webm/webm_video_client.cc
diff --git a/media/formats/webm/webm_video_client.cc b/media/formats/webm/webm_video_client.cc
index 6e57dfbe4f6b6327be3a5e9fbc88da9e54d45d81..9d0435f051dca2b1b80e8bca4f522a6ac450c03a 100644
--- a/media/formats/webm/webm_video_client.cc
+++ b/media/formats/webm/webm_video_client.cc
@@ -33,7 +33,7 @@ void WebMVideoClient::Reset() {
 bool WebMVideoClient::InitializeConfig(
     const std::string& codec_id,
     const std::vector<uint8_t>& codec_private,
-    bool is_encrypted,
+    const EncryptionScheme& encryption_scheme,
     VideoDecoderConfig* config) {
   DCHECK(config);
 
@@ -93,7 +93,7 @@ bool WebMVideoClient::InitializeConfig(
 
   config->Initialize(video_codec, profile, format, COLOR_SPACE_HD_REC709,
                      coded_size, visible_rect, natural_size, codec_private,
-                     is_encrypted);
+                     encryption_scheme);
   return config->IsValidConfig();
 }