Have VDA clients inform decoder of supported picture buffer formats

media/video/video_decode_accelerator.h

Index: media/video/video_decode_accelerator.h
diff --git a/media/video/video_decode_accelerator.h b/media/video/video_decode_accelerator.h
index 994d1cb3f5cd6cbd2e16415c61c49e660833a31a..62927eae59fb36e791211544fce0f7c6c3474842 100644
--- a/media/video/video_decode_accelerator.h
+++ b/media/video/video_decode_accelerator.h
@@ -115,12 +115,15 @@ class MEDIA_EXPORT VideoDecodeAccelerator {
       IMPORT,
     };
 
-    Config() = default;
+    Config();
+    Config(const Config& config);
 
     // Intentional converting constructor.
     // TODO(watk): Make this explicit.
     Config(VideoCodecProfile profile);
 
+    ~Config();
+
     std::string AsHumanReadableString() const;
 
     // The video codec and profile.
@@ -145,6 +148,10 @@ class MEDIA_EXPORT VideoDecodeAccelerator {
     gfx::Size initial_expected_coded_size = gfx::Size(320, 240);
 
     OutputMode output_mode = OutputMode::ALLOCATE;
+
+    // The list of picture buffer formats that the client knows how to use. An
+    // empty list means any format is supported.
+    std::vector<VideoPixelFormat> supported_output_formats;
   };
 
   // Interface for collaborating with picture interface to provide memory for