Parse and apply Webrtc Hybrid Agc experiment flags and params.

The new params introduce options to change the saturation margin,
and choose between peak- and RMS-based algorithms.

Make sure params are applied both in AudioProcessor and
MediaStreamAudioProcessor.

Bug: 873650
Change-Id: Ia7584ec17a1e0bc7bec5973da3d143456ec26c41
Reviewed-on: https://chromium-review.googlesource.com/c/1333388
Commit-Queue: Alex Loiko <[email protected]>
Reviewed-by: Max Morin <[email protected]>
Reviewed-by: Avi Drissman <[email protected]>
Cr-Commit-Position: refs/heads/master@{#608718}
diff --git a/chrome/browser/DEPS b/chrome/browser/DEPS
index aae54346..06b02b1 100644
--- a/chrome/browser/DEPS
+++ b/chrome/browser/DEPS
@@ -51,6 +51,7 @@
   "+media/midi",  # For midi switches
   "+media/mojo",  # For mojo media services.
   "+media/renderers",
+  "+media/webrtc",  # For webrtc media switches.
   "+ppapi/c",  # For various types.
   "+ppapi/host",
   "+ppapi/proxy",