Support multiple video decoders and encoders

media/video/video_encode_accelerator.h

Index: media/video/video_encode_accelerator.h
diff --git a/media/video/video_encode_accelerator.h b/media/video/video_encode_accelerator.h
index 9551c22a769d58473bfbfa66bfc92d712a3d164b..433a992bd3a3470a86a009a5bf0d6a401715dcb0 100644
--- a/media/video/video_encode_accelerator.h
+++ b/media/video/video_encode_accelerator.h
@@ -28,6 +28,9 @@ class MEDIA_EXPORT VideoEncodeAccelerator {
     gfx::Size max_resolution;
     uint32 max_framerate_numerator;
     uint32 max_framerate_denominator;
+    bool operator< (const SupportedProfile& other) const {
+      return profile < other.profile;

[Pawel Osciak, 2014/12/28 23:28:03]

This is not enough. If encoder A comes first, but supports a smaller range of
resolutions than encoder B, we don't want to dismiss B's capabilities. Same for
framerate.

What we should do is look for profile among the already found profiles, if we
find one, construct a superset of other values and update it.

I'm not sure about having a '<' operator for this, it's is not a behavior one
would expect. I think a regular vector would be small enough to not have a set
at all.

[henryhsu, 2014/12/29 09:43:27]

as discussed, save a list of all profiles if some parameters are different.

+    }
   };
 
   // Enumeration of potential errors generated by the API.