Switch audio hang monitor to default-off. Enable for non-beta,stable.

chrome/browser/chrome_browser_main.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/chrome_browser_main.h"
 
 #include <set>
 #include <string>
 #include <vector>
 
@@ skipping 114 matching lines @@
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/notification_types.h"
 #include "content/public/browser/power_usage_monitor.h"
 #include "content/public/browser/site_instance.h"
 #include "content/public/common/content_client.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/common/main_function_params.h"
 #include "grit/platform_locale_settings.h"
+#include "media/audio/audio_manager.h"
 #include "net/base/net_module.h"
 #include "net/cookies/cookie_monster.h"
 #include "net/http/http_network_layer.h"
 #include "net/http/http_stream_factory.h"
 #include "net/url_request/url_request.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/layout.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/strings/grit/app_locale_settings.h"
 
@@ skipping 514 matching lines @@
 
   // Initialize FieldTrialSynchronizer system. This is a singleton and is used
   // for posting tasks via base::Bind. Its deleted when it goes out of scope.
   // Even though base::Bind does AddRef and Release, the object will not be
   // deleted after the Task is executed.
   field_trial_synchronizer_ = new FieldTrialSynchronizer();
 
   // Now that field trials have been created, initializes metrics recording.
   metrics->InitializeMetricsRecordingState();
 
+  const chrome::VersionInfo::Channel channel =
+      chrome::VersionInfo::GetChannel();
+
+  // TODO(dalecurtis): Remove these checks and enable for all channels once we
+  // track down the root causes of crbug.com/422522 and crbug.com/478932.

[Nico, 2015/04/28 17:53:38]

do you want to do this only on windows then?

[DaleCurtis, 2015/04/28 18:27:09]

Not yet, I'd like more confidence given the lower user counts on dev, beta for
other platforms. We already had one googler bug pointing to a broken pulseaudio
install.

[DaleCurtis, 2015/04/28 18:27:27]

Err lower user counts on dev, not beta.

+  if (channel == chrome::VersionInfo::CHANNEL_UNKNOWN ||
+      chrome::VersionInfo::CHANNEL_CANARY || chrome::VersionInfo::CHANNEL_DEV) {
+    media::AudioManager::EnableHangMonitor();
+  }
+
   // Enable profiler instrumentation depending on the channel.
-  switch (chrome::VersionInfo::GetChannel()) {
+  switch (channel) {
     case chrome::VersionInfo::CHANNEL_UNKNOWN:
     case chrome::VersionInfo::CHANNEL_CANARY:
       tracked_objects::ScopedTracker::Enable();
       break;
 
     case chrome::VersionInfo::CHANNEL_DEV:
     case chrome::VersionInfo::CHANNEL_BETA:
     case chrome::VersionInfo::CHANNEL_STABLE:
       // Don't enable instrumentation.
       break;
@@ skipping 1074 matching lines @@
   chromeos::CrosSettings::Shutdown();
 #endif  // defined(OS_CHROMEOS)
 #endif  // defined(OS_ANDROID)
 }
 
 // Public members:
 
 void ChromeBrowserMainParts::AddParts(ChromeBrowserMainExtraParts* parts) {
   chrome_extra_parts_.push_back(parts);
 }