Moves cast-specific prefs into chromecast namespace.

chromecast/base/pref_names.cc

Index: chromecast/base/pref_names.cc
diff --git a/chromecast/base/pref_names.cc b/chromecast/base/pref_names.cc
index 1b679dbb5d5a0a3b1bc5440105c77abafd0121a8..237f133663f7ce5b241bd0c87607e210981d9c4e 100644
--- a/chromecast/base/pref_names.cc
+++ b/chromecast/base/pref_names.cc
@@ -4,6 +4,7 @@
 
 #include "chromecast/base/pref_names.h"
 
+namespace chromecast {
 namespace prefs {
 
 // Boolean which specifies if remote debugging is enabled
@@ -48,3 +49,4 @@ const char kStabilitySystemUncleanShutdownCount[] =
     "user_experience_metrics.stability.system_unclean_shutdowns";
 
 }  // namespace prefs
+}  // namespace chromecast