Fix a minor error in content_browser_manifest.json

In a previous CL:https://codereview.chromium.org/2259903002, this CL
adds some interface to be white-listed, it includes
blink::mojom::OffscreenCanvasFrameReceiver. However, this interface is
recently renamed to blink::mojom::OffscreenCanvasCompositorFrameSinkProvider.

This CL makes that change.

TBR=ben@chromium.org

Review-Url: https://codereview.chromium.org/2359193002
Cr-Commit-Position: refs/heads/master@{#420361}
1 file changed