Fix lock behavior on RTCAudioSession.

webrtc/base/BUILD.gn

 # Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
 #
 # Use of this source code is governed by a BSD-style license
 # that can be found in the LICENSE file in the root of the source
 # tree. An additional intellectual property rights grant can be found
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
 import("//build/config/crypto.gni")
 import("//build/config/ui.gni")
@@ skipping 123 matching lines @@
     "platform_file.cc",
     "platform_file.h",
     "platform_thread.cc",
     "platform_thread.h",
     "platform_thread_types.h",
     "random.cc",
     "random.h",
     "rate_statistics.cc",
     "rate_statistics.h",
     "refcount.h",
+    "scoped_autorelease_pool.h",
+    "scoped_autorelease_pool.mm",
     "scoped_ptr.h",
     "scoped_ref_ptr.h",
     "stringencode.cc",
     "stringencode.h",
     "stringutils.cc",
     "stringutils.h",
     "systeminfo.cc",
     "systeminfo.h",
     "template_util.h",
     "thread_annotations.h",
@@ skipping 122 matching lines @@
     "proxydetect.cc",
     "proxydetect.h",
     "proxyinfo.cc",
     "proxyinfo.h",
     "ratelimiter.cc",
     "ratelimiter.h",
     "ratetracker.cc",
     "ratetracker.h",
     "rtccertificate.cc",
     "rtccertificate.h",
-    "scoped_autorelease_pool.h",
-    "scoped_autorelease_pool.mm",
     "sha1.cc",
     "sha1.h",
     "sha1digest.cc",
     "sha1digest.h",
     "sharedexclusivelock.cc",
     "sharedexclusivelock.h",
     "signalthread.cc",
     "signalthread.h",
     "sigslot.cc",
     "sigslot.h",
@@ skipping 368 matching lines @@
   deps = [
     ":rtc_base_approved",
   ]
   sources = [
     "numerics/safe_conversions.h",
     "numerics/safe_conversions_impl.h",
     "numerics/safe_math.h",
     "numerics/safe_math_impl.h",
   ]
 }