Remove the CHECK when we fail to set the DXVA decoder output type.

This CHECK fires intermittently and appears to be caused by buggy drivers and or AV malware combinations. In most of the crashes, I debugged, the failure was MF_E_INVALIDMEDIATYPE which indicates that the driver does not support H.264 decoding.

In any case this code has now baked for a while on the field for DX11 and Win8+. So it should be ok to remove the CHECK

BUG=588358
R=sandersd

Review URL: https://codereview.chromium.org/1770223002

Cr-Commit-Position: refs/heads/master@{#379704}

content/common/gpu/media/dxva_video_decode_accelerator_win.cc

@@ -2448,12 +2448,6 @@ bool DXVAVideoDecodeAccelerator::SetTransformOutputType(
         RETURN_ON_HR_FAILURE(hr, "Failed to set media type attributes", false);
       }
       hr = transform->SetOutputType(0, media_type.get(), 0);  // No flags
-      if (FAILED(hr)) {
-        base::debug::Alias(&hr);
-        // TODO(ananta)
-        // Remove this CHECK when this stabilizes in the field.
-        CHECK(false);
-      }
       RETURN_ON_HR_FAILURE(hr, "Failed to set output type", false);
       return true;
     }