opus: try optimizing for speed

This target comprises 1.95% of our total Chrome samples, but isn't
optimized for speed except on ARM. It may be worthwhile to optimize it
in this way.

This includes a miscellaneous `git cl format`.

Bug: 1143481
Change-Id: Ifa6a25a4f1954289a5f54fc3785e2e83de431c4e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2507572Reviewed-by: Nico Weber <thakis@chromium.org>
Reviewed-by: Felicia Lim <flim@chromium.org>
Reviewed-by: Henrik Andreasson <henrika@chromium.org>
Commit-Queue: George Burgess <gbiv@chromium.org>
Cr-Commit-Position: refs/heads/master@{#836328}

third_party/opus/BUILD.gn

@@ -388,7 +388,7 @@ static_library("opus") {
   ]
   public_configs = [ ":opus_config" ]
 
-  if (!is_debug && (current_cpu == "arm" || current_cpu == "arm64")) {
+  if (!is_debug) {
     configs -= [ "//build/config/compiler:default_optimization" ]
 
     # TODO(crbug.com/621335) Rework this so that we don't have the confusion