Reduce chrome cras dbus call logs during device rebooting.

chrome/browser/chromeos/chrome_browser_main_chromeos.cc

 // Copyright (c) 2013 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/chromeos/chrome_browser_main_chromeos.h"
 
 #include <string>
 #include <vector>
 
 #include "ash/ash_switches.h"
@@ skipping 219 matching lines @@
       local_state->ClearPref(prefs::kRebootAfterUpdate);
     }
   } else if (parsed_command_line.HasSwitch(switches::kLoginUser) &&
              parsed_command_line.HasSwitch(switches::kLoginPassword)) {
     BootTimesLoader::Get()->RecordLoginAttempted();
     new StubLogin(
         parsed_command_line.GetSwitchValueASCII(switches::kLoginUser),
         parsed_command_line.GetSwitchValueASCII(switches::kLoginPassword));
   } else {
     if (!parsed_command_line.HasSwitch(::switches::kTestName)) {
+      // Enable CrasAudioHandler logging when chrome restarts after crashing.
+      if (chromeos::CrasAudioHandler::IsInitialized())
+        chromeos::CrasAudioHandler::Get()->EnableLog();
+
       // We did not log in (we crashed or are debugging), so we need to
       // restore Sync.
       LoginUtils::Get()->RestoreAuthenticationSession(profile);
     }
   }
 }
 
 }  // namespace
 
 namespace internal {
@@ skipping 537 matching lines @@
 
   // Destroy DeviceSettingsService after g_browser_process.
   DeviceSettingsService::Shutdown();
 }
 
 void ChromeBrowserMainPartsChromeos::SetupPlatformFieldTrials() {
   default_pinned_apps_field_trial::SetupTrial();
 }
 
 }  //  namespace chromeos