Make callers of CommandLine use it via the base:: namespace.

media/audio/win/core_audio_util_win.cc

Index: media/audio/win/core_audio_util_win.cc
diff --git a/media/audio/win/core_audio_util_win.cc b/media/audio/win/core_audio_util_win.cc
index fdf59665b2272a6deb61b5d911edb1d8ce57af89..b56d6e6a6e13f9ef749ec4ac57c5e5111c102164 100644
--- a/media/audio/win/core_audio_util_win.cc
+++ b/media/audio/win/core_audio_util_win.cc
@@ -158,7 +158,7 @@ static std::string GetDeviceID(IMMDevice* device) {
 
 bool CoreAudioUtil::IsSupported() {
   // It is possible to force usage of WaveXxx APIs by using a command line flag.
-  const CommandLine* cmd_line = CommandLine::ForCurrentProcess();
+  const base::CommandLine* cmd_line = base::CommandLine::ForCurrentProcess();
   if (cmd_line->HasSwitch(switches::kForceWaveAudio)) {
     DVLOG(1) << "Forcing usage of Windows WaveXxx APIs";
     return false;
@@ -197,7 +197,7 @@ base::TimeDelta CoreAudioUtil::RefererenceTimeToTimeDelta(REFERENCE_TIME time) {
 }
 
 AUDCLNT_SHAREMODE CoreAudioUtil::GetShareMode() {
-  const CommandLine* cmd_line = CommandLine::ForCurrentProcess();
+  const base::CommandLine* cmd_line = base::CommandLine::ForCurrentProcess();
   if (cmd_line->HasSwitch(switches::kEnableExclusiveAudio))
     return AUDCLNT_SHAREMODE_EXCLUSIVE;
   return AUDCLNT_SHAREMODE_SHARED;