[Chromecast] Remove command-line switch to change the number of mixer output channels

chromecast/base/chromecast_switches.cc

 // Copyright 2014 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 "chromecast/base/chromecast_switches.h"
 
 #include "base/command_line.h"
 
 namespace switches {
 
@@ skipping 46 matching lines @@
 // How many frames need to be in the output buffer before output starts.
 const char kAlsaOutputStartThreshold[] = "alsa-output-start-threshold";
 
 // Minimum number of available frames for scheduling a transfer.
 const char kAlsaOutputAvailMin[] = "alsa-output-avail-min";
 
 // Time in ms to wait before closing the PCM handle when no more mixer inputs
 // remain. Assumed to be 0 if --accept-resource-provider is present.
 const char kAlsaCheckCloseTimeout[] = "alsa-check-close-timeout";
 
-// Number of channels on the alsa output device that the stream mixer uses.
-// Default is 2 channels.
-const char kAlsaNumOutputChannels[] = "alsa-num-output-channels";
-
 // Optional flag to set a fixed sample rate for the alsa device.
 const char kAlsaFixedOutputSampleRate[] = "alsa-fixed-output-sample-rate";
 
 }  // namespace switches
 
 namespace chromecast {
 
 bool GetSwitchValueBoolean(const std::string& switch_string,
                            const bool default_value) {
   const base::CommandLine* command_line =
       base::CommandLine::ForCurrentProcess();
   if (command_line->HasSwitch(switch_string)) {
     if (command_line->GetSwitchValueASCII(switch_string) !=
             switches::kSwitchValueTrue &&
         command_line->GetSwitchValueASCII(switch_string) !=
             switches::kSwitchValueFalse &&
         command_line->GetSwitchValueASCII(switch_string) != "") {
       LOG(WARNING) << "Invalid switch value " << switch_string << "="
                    << command_line->GetSwitchValueASCII(switch_string)
                    << "; assuming default value of " << default_value;
       return default_value;
     }
     return command_line->GetSwitchValueASCII(switch_string) !=
            switches::kSwitchValueFalse;
   }
   return default_value;
 }
 
 }  // namespace chromecast