Have VDA clients inform decoder of supported picture buffer formats

content/renderer/pepper/pepper_video_decoder_host.cc

Index: content/renderer/pepper/pepper_video_decoder_host.cc
diff --git a/content/renderer/pepper/pepper_video_decoder_host.cc b/content/renderer/pepper/pepper_video_decoder_host.cc
index cf5d49cdb890e613f7cb42c25ac68c8e5345ec39..3ca1c3b1b9fe0f7fba6e914a27e8d7e19fdc3ae2 100644
--- a/content/renderer/pepper/pepper_video_decoder_host.cc
+++ b/content/renderer/pepper/pepper_video_decoder_host.cc
@@ -149,7 +149,10 @@ int32_t PepperVideoDecoderHost::OnHostMsgInitialize(
     // it is okay to immediately send IPC messages.
     if (command_buffer->channel()) {
       decoder_.reset(new media::GpuVideoDecodeAcceleratorHost(command_buffer));
-      if (decoder_->Initialize(profile_, this)) {
+      media::VideoDecodeAccelerator::Config vda_config(profile_);
+      vda_config.supported_output_formats.assign(
+          {media::PIXEL_FORMAT_XRGB, media::PIXEL_FORMAT_ARGB});
+      if (decoder_->Initialize(vda_config, this)) {
         initialized_ = true;
         return PP_OK;
       }