All users call SetTelephoneEventForwardToDecoder(true). Setting the flag to true on construction, enables deletion of those calls, followed by deletion of the flag itself. The unused getter method TelephoneEventForwardToDecoder() is deleted right away. Bug: webrtc:7135 Change-Id: I8c52c957b3f074be7ffc425b3588402d1e42b844 Reviewed-on: https://webrtc-review.googlesource.com/90402 Reviewed-by: Oskar Sundbom <ossu@webrtc.org> Reviewed-by: Åsa Persson <asapersson@webrtc.org> Commit-Queue: Niels Moller <nisse@webrtc.org> Cr-Commit-Position: refs/heads/master@{#24141}