This CL ensures that the pre-amplifier and the high-pass filter submodules are not reallocated more than needed. Bug: webrtc:5298 Change-Id: I7ed23807d4d2d9fef0eda2e7dca9de9b0b1a4649 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/163988 Commit-Queue: Per Åhgren <peah@webrtc.org> Reviewed-by: Sam Zackrisson <saza@webrtc.org> Cr-Commit-Position: refs/heads/master@{#30143}