Rename the webrtc_adm_linux* namespaces to webrtc::adm_linux*

webrtc/modules/audio_device/linux/alsasymboltable_linux.h

Index: webrtc/modules/audio_device/linux/alsasymboltable_linux.h
diff --git a/webrtc/modules/audio_device/linux/alsasymboltable_linux.h b/webrtc/modules/audio_device/linux/alsasymboltable_linux.h
index 82690c50079030be09da40dfcffc438a0d4850b9..14b016cf67dbed53ab652c48b150ffa97f2a1535 100644
--- a/webrtc/modules/audio_device/linux/alsasymboltable_linux.h
+++ b/webrtc/modules/audio_device/linux/alsasymboltable_linux.h
@@ -30,7 +30,8 @@
 
 #include "webrtc/modules/audio_device/linux/latebindingsymboltable_linux.h"
 
-namespace webrtc_adm_linux_alsa {
+namespace webrtc {
+namespace adm_linux_alsa {
 
 // The ALSA symbols we need, as an X-Macro list.
 // This list must contain precisely every libasound function that is used in
@@ -142,6 +143,7 @@ ALSA_SYMBOLS_LIST
 #undef X
 LATE_BINDING_SYMBOL_TABLE_DECLARE_END(AlsaSymbolTable)
 
-}  // namespace webrtc_adm_linux_alsa
+}  // namespace adm_linux_alsa
+}  // namespace webrtc
 
 #endif  // WEBRTC_AUDIO_DEVICE_ALSASYMBOLTABLE_LINUX_H