Add audio switches to utility process whitelist.

This CL adds the audio related switches which are used by the audio
service to the whitelisted switches for utility processes. This is
needed when running the audio service out of process.

Also moves all the ifdefed switches to the bottom.

Bug: 843103
Change-Id: I2172d02b28f5011a915c89d9509dd15ccb166950
Reviewed-on: https://chromium-review.googlesource.com/1059624
Commit-Queue: Max Morin <maxmorin@chromium.org>
Reviewed-by: Kinuko Yasuda <kinuko@chromium.org>
Cr-Commit-Position: refs/heads/master@{#559472}

content/browser/utility_process_host.cc

@@ -284,6 +284,23 @@ bool UtilityProcessHost::StartProcess() {
       switches::kUseGL,
 #if defined(OS_ANDROID)
       switches::kOrderfileMemoryOptimization,
+#endif
+      // These flags are used by the audio service:
+      switches::kAudioBufferSize,
+      switches::kAudioServiceQuitTimeoutMs,
+      switches::kDisableAudioOutput,
+      switches::kFailAudioStreamCreation,
+      switches::kMuteAudio,
+      switches::kUseFileForFakeAudioCapture,
+#if defined(OS_LINUX) || defined(OS_FREEBSD) || defined(OS_SOLARIS)
+      switches::kAlsaInputDevice,
+      switches::kAlsaOutputDevice,
+#endif
+#if defined(OS_WIN)
+      switches::kEnableExclusiveAudio,
+      switches::kForceWaveAudio,
+      switches::kTrySupportedChannelLayouts,
+      switches::kWaveOutBuffers,
 #endif
     };
     cmd_line->CopySwitchesFrom(browser_command_line, kSwitchNames,